Jingdezhen is a prefecture-level city , in eastern Jiangxi province, with a total population of 1,669,057 (2018), bordering Anhui to the north. It is known as the " Porcelain Capital" because it has been producing Chinese ceramics for at least 1,000 years, and for much of that period Jingdezhen porcelain was the most important and finest quality in China. The city has a well-documented history that stretches back over 2,000 years.
138-829: Throughout both the Spring and Autumn period and the Warring States period , the area of present-day Jingdezhen belonged to the Chu State . After the fall of the Chu, the area was incorporated into the Qin dynasty as part of Fan County ( 番县 ) in Jiujiang Commandery [ zh ] . Under the Han dynasty , the area belonged to Poyang County ( 鄱阳县 ) in Yuzhang Commandery [ zh ] . Under
276-666: A blue and white porcelain jar produced during the Yuan dynasty auctioning for $ 27.7 million in London in 2005, and a porcelain cup produced during the Ming dynasty auctioning for $ 36.3 million in 2014. Jingdezhen serves as an important industrial and commercial base in Jiangxi Province . In 2018, Jingdezhen achieved a GDP of 92.611 billion yuan. Of this, 6.62% of the city's GDP came from its primary sector , 44.22% came from its secondary sector , and
414-467: A half-life of 3.7 million years, Mn with a half-life of 312.2 days, and Mn with a half-life of 5.591 days. All of the remaining radioactive isotopes have half-lives of less than three hours, and the majority of less than one minute. The primary decay mode in isotopes lighter than the most abundant stable isotope, Mn, is electron capture and the primary mode in heavier isotopes is beta decay . Manganese also has three meta states . Manganese
552-409: A magnesia nigra (the black ore) from magnesia alba (a white ore, also from Magnesia, also useful in glassmaking). Michele Mercati called magnesia nigra manganesa , and finally the metal isolated from it became known as manganese ( German : Mangan ). The name magnesia eventually was then used to refer only to the white magnesia alba (magnesium oxide), which provided the name magnesium for
690-555: A few large and powerful principalities dominated China. Some southern states, such as Chu and Wu , claimed independence from the Zhou, who undertook wars against some of them (Wu and Yue ). Amid the interstate power struggles, internal conflict was also rife: six elite landholding families waged war on each other inside Jin, political enemies set about eliminating the Chen family in Qi, and the legitimacy of
828-596: A lesser extent as rhodochrosite ( MnCO 3 ). The most important manganese ore is pyrolusite ( MnO 2 ). Other economically important manganese ores usually show a close spatial relation to the iron ores, such as sphalerite . Land-based resources are large but irregularly distributed. About 80% of the known world manganese resources are in South Africa; other important manganese deposits are in Ukraine, Australia, India, China, Gabon and Brazil. According to 1978 estimate,
966-401: A neighbour of Wu and Jin's nemesis in the struggle for hegemony. King Shoumeng accepted the offer, and Wu would continue to harass Chu for years to come. After a period of increasingly exhausting warfare, Qi, Qin, Jin and Chu met at a disarmament conference in 579 and agreed to declare a truce to limit their military strength. This peace did not last very long and it soon became apparent that
1104-442: A primitive cubic structure with 20 atoms per unit cell at two types of sites, which is as complex as that of any other elemental metal. It is easily obtained as a metastable phase at room temperature by rapid quenching. It does not show magnetic ordering , remaining paramagnetic down to the lowest temperature measured (1.1 K). Gamma manganese (γ-Mn) forms when heated above 1,370 K (1,100 °C; 2,010 °F). It has
1242-485: A river leading to river systems flowing north and south, facilitating transport of fragile wares. The imperial kilns were in the centre of the city at Zhushan (Pearl Hill), with many other kilns four kilometres away at Hutian. It has produced a great variety of pottery and porcelain, for the Chinese market and as Chinese export porcelain , but its best-known high quality porcelain wares have been successively Qingbai ware in
1380-399: A rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In
1518-447: A simple face-centered cubic structure (four atoms per unit cell). When quenched to room temperature it converts to β-Mn, but it can be stabilized at room temperature by alloying it with at least 5 percent of other elements (such as C, Fe, Ni, Cu, Pd or Au), and these solute-stabilized alloys distort into a face-centered tetragonal structure. Delta manganese (δ-Mn) forms when heated above 1,406 K (1,130 °C; 2,070 °F) and
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#17328583537511656-501: A succession struggle in 635, the king awarded Jin with strategically valuable territory near Chengzhou. Duke Wen then used his growing power to coordinate a military response with Qi, Qin, and Song against Chu, which had begun encroaching northward after the death of Duke Huán of Qi. With a decisive Chu loss at the Battle of Chengpu in 632, Duke Wen's loyalty to the Zhou king was rewarded at an interstate conference when King Xīang awarded him
1794-450: A total 2182 beds. Doctors and nurses number 2,672. It has the largest hospital system in the north-east of Jiangxi Province. The No.1, No.2 and No.3 People's Hospital of Jingdezhen are the most important hospitals in the city; the No.4 People's Hospital is a psychiatric hospital . Jingdezhen is a major tourism destination within Jiangxi Province , receiving 85.063 million tourists in 2018. Many of
1932-449: A town is upgraded to a city, the designation of shi meaning city replaces that of zhen . In June 1953 Jindezhen was upgraded into a provincial level city. In 1960, Fuliang County was merged into the city. Jingdezhen was named one of top 24 national historical and cultural cities of the People's Republic of China on February 28, 1982. In July 1983, Leping County was also merged into
2070-466: Is Boyang County . Lastly, to its southeast are Wuyuan County and Dexing City . The prefecture's natural resources include kaolin , coal, manganese , and lime . Although various forms of kaolin has since been found around the world, it was the Jingdezhen kilns who first perfected its use in combination with petuntse to create world-class hard-paste porcelain . The name "kaolin" itself derives from
2208-498: Is 1,805 mm (71.1 in). With monthly percent possible sunshine ranging from 25% in March to 56% in August, the city receives 1,798 hours of bright sunshine annually. Winter begins somewhat sunny and dry but becomes progressively wetter and cloudier; spring begins especially gloomy, and from March to July each of the months averages more than 190 mm (7.5 in) of rainfall. Summer is
2346-436: Is MnO 2 . It is the dark brown pigment of many cave drawings but is also a common ingredient in dry cell batteries. Complexes of Mn(IV) are well known, but they require elaborate ligands . Mn(IV)-OH complexes are an intermediate in some enzymes , including the oxygen evolving center (OEC) in plants. Simple derivatives Mn are rarely encountered but can be stabilized by suitably basic ligands. Manganese(III) acetate
2484-430: Is a chemical element ; it has symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron . Manganese was first isolated in the 1770s. It is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels . It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as
2622-466: Is a brown pigment for paint and is a constituent of natural umber . Tetravalent manganese is used as an activator in red-emitting phosphors . While many compounds are known which show luminescence , the majority are not used in commercial application due to low efficiency or deep red emission. However, several Mn activated fluorides were reported as potential red-emitting phosphors for warm-white LEDs. But to this day, only K 2 SiF 6 :Mn
2760-552: Is a commonly used laboratory reagent because of its oxidizing properties; it is used as a topical medicine (for example, in the treatment of fish diseases). Solutions of potassium permanganate were among the first stains and fixatives to be used in the preparation of biological cells and tissues for electron microscopy. Aside from various permanganate salts, Mn(VII) is represented by the unstable, volatile derivative Mn 2 O 7 . Oxyhalides (MnO 3 F and MnO 3 Cl) are powerful oxidizing agents . The most prominent example of Mn in
2898-423: Is a major vegetable growing and processing area for Jiangxi Province even for China. Its vegetable output and sales are important to the agricultural economy of Jiangxi Province. In 2007, Leping had 1.7 million hectares under cultivation that produced a total output of 620,000 tons. The Agriculture Ministry of China also designated Leping as a demonstration zone for "pollution-free" vegetable production. Jingdezhen
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#17328583537513036-494: Is a silvery-gray metal that resembles iron. It is hard and very brittle, difficult to fuse, but easy to oxidize. Manganese and its common ions are paramagnetic . Manganese tarnishes slowly in air and oxidizes ("rusts") like iron in water containing dissolved oxygen. Naturally occurring manganese is composed of one stable isotope , Mn. Several radioisotopes have been isolated and described, ranging in atomic weight from 46 u ( Mn) to 72 u ( Mn). The most stable are Mn with
3174-549: Is also seen in the mineral rhodochrosite ( manganese(II) carbonate ). Manganese(II) commonly exists with a high spin, S = 5/2 ground state because of the high pairing energy for manganese(II). There are no spin-allowed d–d transitions in manganese(II), which explain its faint color. Manganese forms a large variety of organometallic derivatives, i.e., compounds with Mn-C bonds. The organometallic derivatives include numerous examples of Mn in its lower oxidation states, i.e. Mn(−III) up through Mn(I). This area of organometallic chemistry
3312-568: Is an oxidant useful in organic synthesis . Solid compounds of manganese(III) are characterized by its strong purple-red color and a preference for distorted octahedral coordination resulting from the Jahn-Teller effect . A particularly common oxidation state for manganese in aqueous solution is +2, which has a pale pink color. Many manganese(II) compounds are known, such as the aquo complexes derived from manganese(II) sulfate (MnSO 4 ) and manganese(II) chloride (MnCl 2 ). This oxidation state
3450-464: Is attractive because Mn is inexpensive and of relatively low toxicity. Of greatest commercial interest is "MMT", methylcyclopentadienyl manganese tricarbonyl , which is used as an anti-knock compound added to gasoline (petrol) in some countries. It features Mn(I). Consistent with other aspects of Mn(II) chemistry, manganocene ( Mn(C 5 H 5 ) 2 ) is high-spin. In contrast, its neighboring metal iron forms an air-stable, low-spin derivative in
3588-551: Is based in Jingdezhen. The firm, established in 1969, mainly sells helicopters to the People's Liberation Army , but also does business with firms such as Boeing , Sikorsky , and Leonardo . Changhe produces aircraft parts for the Boeing 767-300BCF . Jiangxi Changhe Automobile Co Ltd , commonly known as Changhe, is an automotive firm owned by BAIC Group which is based in the city. The firm
3726-421: Is dominant in a given soil. At pH values less than 6 or under anaerobic conditions, Mn(II) dominates, while under more alkaline and aerobic conditions, Mn(III,IV) oxides and hydroxides predominate. These effects of soil acidity and aeration state on the form of Mn can be modified or controlled by microbial activity. Microbial respiration can cause both the oxidation of Mn to the oxides, and it can cause reduction of
3864-412: Is forecast to produce 53,400 vehicles in 2019. Jingdezhen Ceramics Co Ltd ( 景德镇陶瓷股份有限公司 ) is a joint venture with a French company and is most famous of Jingdezhen's ceramic companies. In February 2002, then- CCP General Secretary Jiang Zemin presented a porcelain set produced by the company under its Hongye ( 红叶 ) brand to U.S. President George W. Bush . Jingdezhen Refrigeration Compressor Company
4002-545: Is found throughout the world's oceans, 90% of which originates from hydrothermal vents. Particulate Mn develops in buoyant plumes over an active vent source, while the dMn behaves conservatively. Mn concentrations vary between the water columns of the ocean. At the surface, dMn is elevated due to input from external sources such as rivers, dust, and shelf sediments. Coastal sediments normally have lower Mn concentrations, but can increase due to anthropogenic discharges from industries such as mining and steel manufacturing, which enter
4140-458: Is low spin, which contrasts with the high spin character of its precursor, MnBr 2 (dmpe) 2 ( dmpe = (CH 3 ) 2 PCH 2 CH 2 P(CH 3 ) 2 ). Polyalkyl and polyaryl derivatives of manganese often exist in higher oxidation states, reflecting the electron-releasing properties of alkyl and aryl ligands. One example is [Mn(CH 3 ) 6 ] . The origin of the name manganese is complex. In ancient times, two black minerals were identified from
4278-408: Is mainly mined in South Africa, Australia, China, Gabon, Brazil, India, Kazakhstan, Ghana, Ukraine and Malaysia. For the production of ferromanganese , the manganese ore is mixed with iron ore and carbon, and then reduced either in a blast furnace or in an electric arc furnace. The resulting ferromanganese has a manganese content of 30–80%. Pure manganese used for the production of iron-free alloys
Jingdezhen - Misplaced Pages Continue
4416-595: Is not possible to know if what is meant is the Etiquette and Ceremonial (known then as the Book of Rites ) or just the concept of ritual in general. On the other hand, the existence of the Book of Changes is well-attested in the Zuozhuan , as multiple characters use it for divination and accurately quote the received text. Sima Qian claims that it was Confucius who, towards the close of
4554-501: Is part of the iron group of elements, which are thought to be synthesized in large stars shortly before the supernova explosion. Mn decays to Cr with a half-life of 3.7 million years. Because of its relatively short half-life, Mn is relatively rare, produced by cosmic rays impact on iron . Manganese isotopic contents are typically combined with chromium isotopic contents and have found application in isotope geology and radiometric dating . Mn–Cr isotopic ratios reinforce
4692-424: Is produced by leaching manganese ore with sulfuric acid and a subsequent electrowinning process. A more progressive extraction process involves directly reducing (a low grade) manganese ore by heap leaching . This is done by percolating natural gas through the bottom of the heap; the natural gas provides the heat (needs to be at least 850 °C) and the reducing agent (carbon monoxide). This reduces all of
4830-458: Is said is told from the perspective of other states, such as Duke Ai of Lu trying to enlist Yue's help in a coup against the Three Huan. Sima Qian notes that Goujian reigned on until his death, and that afterwards his descendants—for whom no biographical information is given—continued to rule for six generations before the state was finally absorbed into Chu during the Warring States period . After
4968-654: Is situated in the north-east of Jiangxi and borders on Anhui ; the city center area is located in the north-east of the Poyang Lake Plain. Its area is 5,256 km (2,029 sq mi). The highest point is 1,618 m (5,308 ft), with plains on the southern part having an average altitude of 200 m (660 ft). There are some cities and counties between Jiangxi and Anhui Province around Jingdezhen. To its north, northwest and northeast are Dongzhi , Xiuning , and Qimen County of Anhui province. To its south are Wannian County and Yiyang County . To its west
5106-442: Is stable up to the manganese melting point of 1,519 K (1,250 °C; 2,270 °F). It has a body-centered cubic structure (two atoms per cubic unit cell). Common oxidation states of manganese are +2, +3, +4, +6, and +7, although all oxidation states from −3 to +7 have been observed. Manganese in oxidation state +7 is represented by salts of the intensely purple permanganate anion MnO − 4 . Potassium permanganate
5244-923: Is the most important transportation hub in the northeast region of Jiangxi province. Historically, Jingdezhen's main communication route was via the Chang River . It could ship its porcelain down the Chang to Poyang Lake and connected there with the Yangtze River in Hukou County , Jiangxi Province. From there the porcelain could get to the coast for export. Today, the city is connected to the rest of China via road, rail, and air. The Anhui–Jiangxi Railway connects Jingdezhen to many key cities in China such as Shanghai, Nanjing , Jinan , Qingdao , Hefei , Guangzhou , Fuzhou , Xiamen , Nanchang , Kunming and Guiyang , etc. In addition,
5382-514: Is the second largest airport in Jiangxi Province. The largest is at Nanchang . There was only one bus line in Jingdezhen before the 1980s, which was from Huang-ni-tou to Nan-men-tou with a total line distance of 7 kilometres (4.3 miles). In that time, the city had no taxi service and the buses were channel-type bus, it could carry more than one hundred passengers at most at the same time. This kinds of buses were renewed when they were operated to
5520-405: Is unusual among elemental metals in having a very complex unit cell, with 58 atoms per cell (29 atoms per primitive unit cell) in four different types of site. It is paramagnetic at room temperature and antiferromagnetic at temperatures below 95 K (−178 °C). Beta manganese (β-Mn) forms when heated above the transition temperature of 973 K (700 °C; 1,290 °F). It has
5658-412: Is used as a reagent in organic chemistry for the oxidation of benzylic alcohols (where the hydroxyl group is adjacent to an aromatic ring ). Manganese dioxide has been used since antiquity to oxidize and neutralize the greenish tinge in glass from trace amounts of iron contamination. MnO 2 is also used in the manufacture of oxygen and chlorine and in drying black paints. In some preparations, it
Jingdezhen - Misplaced Pages Continue
5796-463: Is well known in China for its non-Eph refrigeration compressor. It holds a 20% share of its market in China. Jingdezhen is a major agricultural center in Jiangxi, with extensive rice cultivation within its boundaries. The area is also an important producer of commodity grain, pigs, and cotton. In Fuliang County there are some large-scale tea plantations and processing facilities. The tea of Fuliang County
5934-520: Is well known in China. Bai Juyi , a famous poet of Tang dynasty China, wrote a poem that says "My merchant loved money more than family, he left me to go to Fuliang to buy tea last month". This suggests that one thousand years ago Fuliang was already well known for its tea. In 1915, Fuliang's "Fuhong" brand tea won a golden prize in Panama–Pacific International Exposition . Leping City, the "Vegetable Township of South China ",
6072-543: The Zuozhuan and Analects frequently quote the Book of Poetry and Book of Documents . On the other hand, the Zuozhuan depicts some characters actually composing poems that would later be included in the received text of the Book of Poetry . In the Analects there are frequent references to "The Rites", but as Classical Chinese does not employ punctuation or any markup to distinguish book titles from regular nouns it
6210-521: The Five Hegemons . He was succeeded by his son King Fuchai of Wu , who nearly destroyed the Yue state, imprisoning King Goujian of Yue . Subsequently, Fuchai defeated Qi and extended Wu influence into central China. In 499, the philosopher Confucius was made acting prime minister of Lu. He is traditionally (if improbably) considered the author or editor of the Spring and Autumn annals , from which much of
6348-984: The French Jesuit d'Entrecolles 's transcription of the local term gāolǐngtǔ ( 高嶺土 ), taken from Gaoling ( 高嶺 , Gāolǐng ), a village in Ehu Town in Fuliang County that provided most of the city's kaolin during the early and mid-Qing dynasty. Jingdezhen has a humid subtropical climate ( Köppen Cfa ) affected by the East Asian monsoon , with long, humid, very hot summers and cool and drier winters with occasional cold snaps. The monthly 24-hour average temperature ranges from 5.6 °C (42.1 °F) in January to 29.1 °C (84.4 °F) in July, with an annual average of 17.81 °C (64.1 °F). The average annual precipitation
6486-485: The Guanzhong region, held nominal power, but had real control over only a small royal demesne centered on Luoyi. During the early part of the Zhou dynasty period, royal relatives and generals had been given control over fiefdoms in an effort to maintain Zhou authority over vast territory. As the power of the Zhou kings waned, these fiefdoms became increasingly independent states . The most important states (known later as
6624-655: The Jingdezhen Ceramic Institute (JCI) , Jingdezhen College [ zh ] , Jiangxi Ceramic Arts and Crafts Vocational and Technical College ( 江西陶瓷工艺美术职业技术学院 ), and Jingdezhen Ceramic Vocational and Technical College ( 景德镇陶瓷职业技术学院 ). Among the city's secondary schools is the No.1 Middle School of Jingdezhen, which was founded in 1940. It is famous for its success rate, relative to other schools in Jiangxi Province, in placing its students in Chinese colleges. Jingdezhen has more than 20 medical service institutions with
6762-590: The Jiujiang - Jingdezhen- Quzhou Railway is under construction. In the near future, the two rail lines will intersect in Jingdezhen, and make the city an important rail transportation hub in Jiangxi Province and East China. The Jingdezhen Railway Station is located in the city center and is under the control of the Nanchang Railway Bureau. Jingdezhen Luojia Airport is located at Luojian Village, northwest of Jingdezhen city, and about 8 km (5.0 mi) from
6900-490: The Middle Ages until modern times and is evident in 14th-century glass from Venice . Because it was used in glassmaking, manganese dioxide was available for experiments by alchemists, the first chemists. Ignatius Gottfried Kaim (1770) and Johann Glauber (17th century) discovered that manganese dioxide could be converted to permanganate , a useful laboratory reagent. Kaim also may have reduced manganese dioxide to isolate
7038-597: The Spartan steel exceptionally hard. Around the beginning of the 19th century, manganese was used in steelmaking and several patents were granted. In 1816, it was documented that iron alloyed with manganese was harder but not more brittle. In 1837, British academic James Couper noted an association between miners' heavy exposure to manganese and a form of Parkinson's disease . In 1912, United States patents were granted for protecting firearms against rust and corrosion with manganese phosphate electrochemical conversion coatings, and
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#17328583537517176-458: The Taiping Rebellion , Taiping forces destroyed all 9,000 kilns in Jingdezhen. They would be rebuilt after the war in 1866. In the 19th century, Jingdezhen became a county . On April 29, 1949, Communist forces took the city. May 4, 1949, it was upgraded to a prefecture city. However, to honor its history, Jingdezhen retained it the word zhen meaning town in its name. Usually when
7314-482: The bà role had become outdated; the four major states had each acquired their own spheres of control and the notion of protecting Zhou territory had become less cogent as the control over (and the resulting cultural assimilation of) non-Zhou peoples, as well as Chu's control of some Zhou areas, further blurred an already vague distinction between Zhou and non-Zhou. In addition, new aristocratic houses were founded with loyalties to powerful states, rather than directly to
7452-632: The era name of the Emperor Zhenzong of Song during whose reign its porcelain production first rose to fame. The town was placed under the jurisdiction of Fuliang County. In the Ming and Qing dynasties, Jingdezhen was considered one of China's four great towns in terms of commercial and industrial importance. The others were Foshan in Guangdong , Hankou in Hubei , and Zhuxian in Henan . In 1855 during
7590-513: The ocean floor has 500 billion tons of manganese nodules . Attempts to find economically viable methods of harvesting manganese nodules were abandoned in the 1970s. In South Africa, most identified deposits are located near Hotazel in the Northern Cape Province , ( Kalahari manganese fields ), with a 2011 estimate of 15 billion tons. In 2011 South Africa produced 3.4 million tons, topping all other nations. Manganese
7728-476: The +6 oxidation state is the green anion manganate , [MnO 4 ] . Manganate salts are intermediates in the extraction of manganese from its ores. Compounds with oxidation states +5 are somewhat elusive, and often found associated to an oxide (O ) or nitride (N ) ligand. One example is the blue anion hypomanganate [MnO 4 ] . Mn(IV) is somewhat enigmatic because it is common in nature but far rarer in synthetic chemistry. The most common Mn ore, pyrolusite ,
7866-487: The 2020s. The real mission of Hughes Glomar Explorer was to raise a sunken Soviet submarine, the K-129 , with the goal of retrieving Soviet code books. An abundant resource of manganese in the form of manganese nodules found on the ocean floor. These nodules, which are composed of 29% manganese, are located along the ocean floor . The environmental impacts of nodule collection are of interest. Dissolved manganese (dMn)
8004-474: The 20th century, manganese dioxide was widely used as the cathodic for commercial disposable dry batteries of both the standard (zinc–carbon) and alkaline types. Manganese is essential to iron and steel production by virtue of its sulfur -fixing, deoxidizing , and alloying properties. This application was first recognized by the British metallurgist Robert Forester Mushet (1811–1891) who, in 1856, introduced
8142-501: The Chu forces advanced to just outside the royal capital of Chengzhou, upon which King Zhuang sent a messenger to inquire into the heft and bulk of the Nine Cauldrons – the symbols of royal ritual authority – implying he might soon arrange to have them moved to his own capital. In the end the Zhou capital was spared, and Chu shifted focus to harassing the nearby state of Zheng. The once-hegemon state of Jin intervened to rescue Zheng from
8280-496: The Chu invaders but were resolutely defeated, which marks the ascension of Chu as the dominant state of the time. Despite his de facto hegemony, King Zhuang's self-proclaimed title of "king" was never recognized by the Zhou states. In the Spring and Autumn Annals he is defiantly referred to as Zi ( 子 , ruler; unratified lord), even at a time when he dominated most of south China. Later historians however always include him as one of
8418-532: The Five Hegemons. In addition to interstate conflict, internal conflicts between state leaders and local aristocrats also occurred. Eventually the dukes of Lu, Jin, Zheng, Wey and Qi would all become figureheads to powerful aristocratic families. In the case of Jin, the shift happened in 588 when the army was split into six independent divisions, each dominated by a separate noble family: Zhi (智), Zhao (趙), Han (韓), Wei (魏), Fan (范), and Zhonghang (中行). The heads of
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#17328583537518556-585: The Han dynasty, the particular area of future Jingdezhen was known as Xinping ( 新平 ). Historical records show that it was during this time that it began to make porcelain. The town was established during the Jin dynasty under the name Changnan ( 昌南 ), due to its location on the south bank of the Chang river. The town's name would be changed twice, first in 742 CE to Fuliang ( 浮梁 ), and then in 1004 to Jingdezhen, its current name, after
8694-534: The King of Zhou, not all sources list him as one of the Five Hegemons. When Duke Wen of Jin came to power in 636 after extensive peregrinations in exile, he capitalized on the reforms of his father, Duke Xian (r. 676–651), who had centralized the state, killed off relatives who might threaten his authority, conquered sixteen smaller states, and even absorbed some Rong and Di peoples to make Jin much more powerful than it had been previously. When he assisted King Xiang in
8832-465: The Solar System. Four allotropes (structural forms) of solid manganese are known, labeled α, β, γ and δ, and occurring at successively higher temperatures. All are metallic, stable at standard pressure, and have a cubic crystal lattice, but they vary widely in their atomic structures. Alpha manganese (α-Mn) is the equilibrium phase at room temperature. It has a body-centered cubic lattice and
8970-666: The Song and Yuan dynasties, blue and white porcelain from the 1330s, and the " famille rose " and other "famille" colours under the Qing dynasty . The town continues to produce cheaper tablewares in great quantity, as well as more expensive decorative pieces. During the Cultural Revolution , Jingdezhen produced a large number of porcelain Mao badges and statues of a seated Mao Zedong . Jingdezhen porcelain has fetched record prices at auctions, with
9108-507: The Spring and Autumn period, edited the received versions of the Book of Poetry , Book of Documents , and Book of Rites ; wrote the "Ten Wings" commentary on the Book of Changes ; and wrote the entirety of the Spring and Autumn Annals . This was long the predominant opinion in China, but modern scholarship considers it unlikely that all five classics could be the product of one man. The transmitted versions of these works all derive from
9246-545: The Western Zhou had concerned itself with politics, the ancestral temples, and legitimacy, in the Eastern Zhou politics came to the fore. Titles which had previously reflected lineage seniority took on purely political meanings. At the top of the bunch were Gong ( 公 ) and Hou ( 侯 ), favoured lineages of old with generally larger territories and greater resources and prestige at their disposal. The majority of rulers were of
9384-546: The Wu capital. Fuchai rushed back but was besieged and died when the city fell in 473. Yue then concentrated on weaker neighbouring states, rather than the great powers to the north. With help from Wu's enemy Chu, Yue was able to be victorious after several decades of conflict. King Goujian destroyed and annexed Wu in 473, after which he was recognized as hegemon. The Zuozhuan , Guoyu , and Shiji provide almost no information about Goujian's subsequent reign or policies. What little
9522-675: The Zhou capital was sacked by the Marquess of Shen and the Quanrong barbarians , the Zhou moved the capital east from the now desolated Zongzhou in Haojing near modern Xi'an to Wangcheng in the Yellow River Valley. The Zhou royalty was then closer to its main supporters, particularly Jin, and Zheng ; the Zhou royal family had much weaker authority and relied on lords from these vassal states for protection, especially during their flight to
9660-422: The Zhou kings, though this process slowed down by the end of the seventh century, possibly because territory available for expansion had been largely exhausted. The Zhou kings had also lost much of their prestige so that, when Duke Dao of Jin (r. 572–558) was recognized as bà , it carried much less meaning than it had before. In 506, King Helü ascended the throne of Wu. With the help of Wu Zixu and Sun Tzu ,
9798-399: The advice of his staff, he attacked the much larger state of Chu. The Song forces were defeated at the battle of Hong ( 泓 ) in 638, and the duke himself died in the following year from an injury sustained in the battle. After Xiang's death his successors adopted a more modest foreign policy, better suited to the country's small size. As Duke Xiang was never officially recognized as hegemon by
9936-564: The alloys particularly useful in harsh automotive and industrial environments. Manganese oxide and sulfate are components of fertilizers. In the year 2000, an estimated 20,000 tons of these compounds were used in fertilizers in the US alone. A comparable amount of Mn compounds was also used in animal feeds. Methylcyclopentadienyl manganese tricarbonyl is an additive in some unleaded gasoline to boost octane rating and reduce engine knocking . Manganese(IV) oxide (manganese dioxide, MnO 2 )
10074-543: The author of The Art of War , he launched major offensives against the state of Chu. They prevailed in five battles, one of which was the Battle of Boju , and conquered the capital Ying. However, Chu managed to ask the state of Qin for help, and after being defeated by Qin, the vanguard general of Wu troops, Fugai, a younger brother of Helü, led a rebellion. After beating Fugai, Helü was forced to leave Chu. Fugai later retired to Chu and settled there. King Helü died during an invasion of Yue in 496. Some sources list him as one of
10212-507: The city there is one quasi-five-star hotel, two four-star hotels, and many three-star and other common grade hotels. Spring and Autumn period The Spring and Autumn period ( c. 770 – c. 481 BCE ) was a period in Chinese history corresponding roughly to the first half of the Eastern Zhou ( c. 771 – 256 BCE), characterized by
10350-503: The city's downtown. CAAC statistics show that in 2008 Jingdezhen Airport served 189,256 passengers, 81st among all Chinese airports. Annual cargo and mail traffic was 119.8 tons; annual landings were 2,424, ranking 111st and 91st respectively in China. There are flights from Jingdezhen to Beijing( CA ), Shanghai( ZH ), Guangzhou( ZH ), Shenzhen( ZH ), Chengdu( CA ), Hangzhou( MU ), Fuzhou( ZH ), Kunming( MU ), Xiamen( CA ), Xi'an( ZH ). There are no international flights. Jingdezhen Airport
10488-529: The city's public budget revenue was ¥8.98555 billion, and its public budget expenditure was ¥20.43550 billion. There are some important industrial enterprises in Jingdezhen City, such as Changhe Aircraft Industries Corporation; Jingdezhen Ceramics; Jingdezhen Refrigeration Compressor, etc. Changhe Aircraft Industries Corporation , a subsidiary of the Aviation Industry Corporation of China ,
10626-519: The city's tourist attractions are related to the city's famous ceramics, including the Ancient Kiln Folk Customs Museum [ zh ] , a 5A tourist attraction . Jingdezhen also has 8 4A tourist attractions, and 14 3A tourist attractions. The city also provides access to nearby popular tourist areas such as Lushan , Huangshan , and Wuyuan . At present, Jingdezhen has the most tourist hotels of any city in Jiangxi Province. In
10764-537: The city. In October 1988, Fuliang County was re-established, and in September 1992, Leping County was re-established as a county-level city . In 2004, Jingdezhen celebrated the millennium of its becoming the porcelain capital and it is assuming its present name. Due to the relatively low cost of living and the heritage of the porcelain industry, Jingdezhen has become a haven for young artists from all over China, who are often referred to known as Jingpiao (景漂). Jingdezhen
10902-419: The disparity in available resources. Alongside this development, there was precedent of Zhou kings "upgrading" noble ranks as a reward for service to the throne, giving the recipients a bit more diplomatic prestige without costing the royal house any land. During the decline of the royal house, although real power was wrested from their grasp, their divine legitimacy was not brought into question, and even with
11040-514: The duke and two senior ministers each in charge of five; military functions were also united with civil ones. These and related reforms provided the state, already powerful from control of trade crossroads, with a greater ability to mobilize resources than the more loosely organized states. By 667, Qi had clearly shown its economic and military predominance, and Duke Huan assembled the leaders of Lu , Song , Chen , and Zheng , who elected him as their leader. Soon after, King Hui of Zhou conferred
11178-451: The eastern capital. In Chengzhou, Prince Yijiu was crowned by his supporters as King Ping . However, with the Zhou domain greatly reduced to Chengzhou and nearby areas, the court could no longer support the six army groups it had in the past; Zhou kings had to request help from powerful vassal states for protection from raids and for resolution of internal power struggles. The Zhou court would never regain its original authority; instead, it
11316-477: The element, in the form of Spiegeleisen . Manganese comprises about 1000 ppm (0.1%) of the Earth's crust and is the 12th most abundant element. Soil contains 7–9000 ppm of manganese with an average of 440 ppm. The atmosphere contains 0.01 μg/m . Manganese occurs principally as pyrolusite ( MnO 2 ), braunite (Mn Mn 6 )SiO 12 ), psilomelane (Ba,H 2 O) 2 Mn 5 O 10 , and to
11454-421: The elite culture, aiming at upward social mobility, typically through the vector of officialdom. One individual well attested in the process of fixing the ranks of rulers into a coherent scheme was Zichan of Zheng , who both submitted a memorial to the king of Chu informing him of the proposed new system in 538 BCE, and argued at a 529 BCE interstate conference that tributes should be graded based on rank, given
11592-420: The emperor, making "imperial porcelain" in large quantity for the court and the emperor to give as gifts. Although apparently an unpromising location for potteries, being a remote town in a hilly region, Jingdezhen is close to the best quality deposits of petuntse , more contemporarily called pottery stone, in China, as well as being surrounded by forests, mostly of pine, providing wood for the kilns. It also has
11730-473: The encounter the duke felt he was not treated with the respect and etiquette which would have been appropriate, given that Zheng was now the chief protector of the capital. In 715, Zheng also became involved in a border dispute with Lu regarding the Fields of Xu. The fields had been put in the care of Lu by the king for the exclusive purpose of producing royal sacrifices for the sacred Mount Tai . For Zheng to regard
11868-479: The end of 1990s. Currently, Jingdezhen public buses and taxis are the two main means of transportation within the city. Nearly more than 20 public bus lines crisscross the city and its countryside. Taxis in Jingdezhen are plentiful; fares start at ¥8 for the first 2 kilometres (1.2 miles). Jingdezhen has 4 higher education institutions, 110 secondary schools , 328 primary schools , and 4 special education schools. The city's 4 higher education institutions are
12006-507: The era, this partitioning left seven major states in the Zhou world: the three fragments of Jin, the three remaining great powers of Qin, Chu and Qi, and the weaker state of Yan ( 燕 ) near modern Beijing. The partition of Jin, along with the Usurpation of Qi by Tian , marks the beginning of the Warring States period . Ancient sources such as the Zuo Zhuan and the eponymous Chunqiu record
12144-508: The evidence from Al and Pd for the early history of the Solar System . Variations in Cr/ Cr and Mn/Cr ratios from several meteorites suggest an initial Mn/ Mn ratio, which indicate that Mn–Cr isotopic composition must result from in situ decay of Mn in differentiated planetary bodies. Hence, Mn provides additional evidence for nucleosynthetic processes immediately before coalescence of
12282-527: The fief of the grandfather of the disinherited crown prince Yijiu —destroyed the Western Zhou capital at Haojing , killing King You and establishing Yijiu as king at the eastern capital Luoyi . The event ushered in the Eastern Zhou dynasty, which is divided into the Spring and Autumn and the Warring States periods. During the Spring and Autumn period, China's feudal fengjian system became largely irrelevant. The Zhou court, having lost its homeland in
12420-414: The fields as just any other piece of land was an insult to the court. By 707, relations had soured enough that the king launched a punitive expedition against Zheng. The duke counterattacked and raided Zhou territory, defeating the royal forces in the Battle of Xuge and injuring the king himself. Zheng was the first vassal to openly defy the king, kicking off the centuries of warfare without respect for
12558-499: The first eleven years of his hegemony, Duke Huan intervened in a power struggle in Lu; protected Yan from encroaching Western Rong nomads; drove off Northern Di nomads after their invasions of Wey and Xing , providing the people with provisions and protective garrison units; and led an alliance of eight states to conquer Cai and thereby block the northward expansion of Chu . At his death in 643, five of Duke Huan's sons contended for
12696-545: The first half of the dynasty left in its wake hundreds of autonomous polities varying drastically in size and resources, nominally connected by bonds of cultural and ritual affiliation increasingly attenuated by the passage of time. Whole lineage groups moved around under socioeconomic stress, border groups not associated with the Zhou culture gained in power and sophistication, and the geopolitical situation demanded increased contact and communication. Under this new regime, an emergent systematization of noble ranks took root. Where
12834-491: The form of ferrocene ( Fe(C 5 H 5 ) 2 ). When conducted under an atmosphere of carbon monoxide , reduction of Mn(II) salts gives dimanganese decacarbonyl Mn 2 (CO) 10 , an orange and volatile solid. The air-stability of this Mn(0) compound (and its many derivatives) reflects the powerful electron-acceptor properties of carbon monoxide. Many alkene complexes and alkyne complexes are derived from Mn 2 (CO) 10 . In Mn(CH 3 ) 2 (dmpe) 2 , Mn(II)
12972-461: The free element when it was isolated much later. Manganese dioxide, which is abundant in nature, has long been used as a pigment. The cave paintings in Gargas that are 30,000 to 24,000 years old are made from the mineral form of MnO 2 pigments. Manganese compounds were used by Egyptian and Roman glassmakers, either to add to, or remove, color from glass. Use as "glassmakers soap" continued through
13110-424: The gradual erosion of royal power as local lords nominally subject to the Zhou exercised increasing political autonomy. The period's name derives from the Spring and Autumn Annals , a chronicle of the state of Lu between 722 and 481 BCE, which tradition associates with Confucius (551–479 BCE). During this period, local polities negotiated their own alliances, waged wars against one another, up to defying
13248-449: The great age of Jin power, the Jin rulers began to lose authority over their ministerial lineages. A full-scale civil war between 497 and 453 ended with the elimination of most noble lines; the remaining aristocratic families divided Jin into three successor states: Han , Wei , and Zhao . This is the last event recorded in the Zuozhuan . With the absorption of most of the smaller states in
13386-725: The hegemon was obligated to protect both the weaker Zhou states and the Zhou royalty from the intruding non-Zhou peoples: the Northern Di , the Southern Man , the Eastern Yi , and the Western Rong . This political framework retained the fēngjiàn power structure, though interstate and intrastate conflict often led to declining regard for clan customs , respect for the Ji family, and solidarity with other Zhou peoples. The king's prestige legitimized
13524-410: The human brain, the manganese is bound to manganese metalloproteins , most notably glutamine synthetase in astrocytes . It is familiar in the laboratory in the form of the deep violet salt potassium permanganate . It occurs at the active sites in some enzymes . Of particular interest is the use of a Mn-O cluster , the oxygen-evolving complex , in the production of oxygen by plants. Manganese
13662-530: The information for this period is drawn. After only two years he was forced to resign and spent many years wandering between different states before returning to Lu. After returning to Lu he did not resume a political career, preferring to teach. Tradition holds that it was in this time he edited or wrote the Five Classics , including the Spring and Autumn Annals . In 482, King Fuchai of Wu held an interstate conference to solidify his power base, but Yue captured
13800-491: The king reduced to something of a figurehead, his prestige remained supreme as Heaven's eldest son. Archaeologically excavated primary sources and received literature agree to a high degree of systematization and stability in noble titles during the Eastern Zhou, indicating an actual historical process. A 2007 survey of bronze inscriptions from 31 states found only eight polities whose rulers used varying titles of nobility to describe themselves. Manganese Manganese
13938-488: The king's court in Luoyi . The gradual Partition of Jin , one of the most powerful states, is generally considered to mark the end of the Spring and Autumn period and the beginning of the Warring States period . This periodization dates back to late Western Han ( c. 48 BCE – c. 9 CE ). In 771 BCE, a Quanrong invasion in coalition with the states of Zeng and Shen —the latter polity being
14076-434: The last third of the Spring and Autumn period. Their first documented interaction with the Spring and Autumn states was in 584, when a Wu force attacked the small border state of Tan ( 郯 ) causing some alarm in the various Chinese courts. Jin was quick to dispatch an ambassador to the court of the Wu king, Shoumeng . Jin promised to supply Wu with modern military technology and training in exchange for an alliance against Chu,
14214-412: The manganese content reaches 4%, the embrittlement of the steel becomes a dominant feature. The embrittlement decreases at higher manganese concentrations and reaches an acceptable level at 8%. Steel containing 8 to 15% of manganese has a high tensile strength of up to 863 MPa. Steel with 12% manganese was discovered in 1882 by Robert Hadfield and is still known as Hadfield steel (mangalloy) . It
14352-503: The manganese ore to manganese oxide (MnO), which is a leachable form. The ore then travels through a grinding circuit to reduce the particle size of the ore to between 150 and 250 μm, increasing the surface area to aid leaching. The ore is then added to a leach tank of sulfuric acid and ferrous iron (Fe ) in a 1.6:1 ratio. The iron reacts with the manganese dioxide (MnO 2 ) to form iron hydroxide (FeO(OH)) and elemental manganese (Mn). This process yields approximately 92% recovery of
14490-457: The manganese. For further purification, the manganese can then be sent to an electrowinning facility. In 1972, the CIA 's Project Azorian , through billionaire Howard Hughes , commissioned the ship Hughes Glomar Explorer with the cover story of harvesting manganese nodules from the sea floor. That triggered a rush of activity to collect manganese nodules, which was not actually practical until
14628-619: The metal, but that is uncertain. By the mid-18th century, the Swedish chemist Carl Wilhelm Scheele used manganese dioxide to produce chlorine . First, hydrochloric acid , or a mixture of dilute sulfuric acid and sodium chloride was made to react with manganese dioxide, and later hydrochloric acid from the Leblanc process was used and the manganese dioxide was recycled by the Weldon process . The production of chlorine and hypochlorite bleaching agents
14766-569: The metals and organic compounds can then cause them to be oxidized while the Mn(III,IV) oxides are reduced to Mn (e.g., Cr to Cr(VI) and colorless hydroquinone to tea-colored quinone polymers). Manganese is essential to iron and steel production by virtue of its sulfur -fixing, deoxidizing , and alloying properties. Manganese has no satisfactory substitute in these applications in metallurgy. Steelmaking , including its ironmaking component, has accounted for most manganese demand, presently in
14904-446: The middling but tiered grades Bo ( 伯 ) and Zi ( 子 ). The rulers of two polities maintained the title Nan ( 男 ). A 2012 survey found no difference in grade between Gong and Hou , or between Zi and Nan . Meanwhile, a new class of lower-tier aristocrats formed: the Shi ( 士 ), gentlemen too distantly related to the great houses to be born into a life of wielding power, but still part of
15042-497: The military leaders of the states, and helped mobilize collective defense of Zhou territory against " barbarians ". Over the next two centuries, the four most powerful states— Qin , Jin , Qi and Chu —struggled for power. These multi-city states often used the pretext of aid and protection to intervene and gain suzerainty over the smaller states. During this rapid expansion, interstate relations alternated between low-level warfare and complex diplomacy. Duke Yin of Lu ascended
15180-524: The ocean from river inputs. Surface dMn concentrations can also be elevated biologically through photosynthesis and physically from coastal upwelling and wind-driven surface currents. Internal cycling such as photo-reduction from UV radiation can also elevate levels by speeding up the dissolution of Mn-oxides and oxidative scavenging, preventing Mn from sinking to deeper waters. Elevated levels at mid-depths can occur near mid-ocean ridges and hydrothermal vents. The hydrothermal vents release dMn enriched fluid into
15318-513: The old traditions which would characterize the period. The display of Zheng's martial strength was effective until succession problems after Zhuang's death in 701 weakened the state. In 692, there was a failed assassination attempt against King Zhuang , orchestrated by elements at court. The first hegemon was Duke Huan of Qi (r. 685–643). With the help of his prime minister, Guan Zhong , Duke Huan reformed Qi to centralize its power structure. The state consisted of 15 " townships " ( 縣 ) with
15456-441: The oxides to the divalent cation. The Mn(III,IV) oxides exist as brownish-black stains and small nodules on sand, silt, and clay particles. These surface coatings on other soil particles have high surface area and carry negative charge. The charged sites can adsorb and retain various cations, especially heavy metals (e.g., Cr , Cu , Zn , and Pb ). In addition, the oxides can adsorb organic acids and other compounds. The adsorption of
15594-422: The periphery, had power and opportunity to expand outward. A total of 148 states are mentioned in the chronicles for this period, 128 of which were absorbed by the four largest states by the end of the period. Shortly after the royal court's move to Chengzhou, a hierarchical alliance system arose where the Zhou king would give the title of hegemon ( 霸 ) to the leader of the state with the most powerful military;
15732-571: The process has seen widespread use ever since. The invention of the Leclanché cell in 1866 and the subsequent improvement of batteries containing manganese dioxide as cathodic depolarizer increased the demand for manganese dioxide. Until the development of batteries with nickel–cadmium and lithium, most batteries contained manganese. The zinc–carbon battery and the alkaline battery normally use industrially produced manganese dioxide because naturally occurring manganese dioxide contains impurities. In
15870-400: The range of 85% to 90% of the total demand. Manganese is a key component of low-cost stainless steel . Often ferromanganese (usually about 80% manganese) is the intermediate in modern processes. Small amounts of manganese improve the workability of steel at high temperatures by forming a high-melting sulfide and preventing the formation of a liquid iron sulfide at the grain boundaries. If
16008-476: The regions of the Magnetes (either Magnesia , located within modern Greece, or Magnesia ad Sipylum , located within modern Turkey). They were both called magnes from their place of origin, but were considered to differ in sex. The male magnes attracted iron, and was the iron ore now known as lodestone or magnetite , and which probably gave us the term magnet . The female magnes ore did not attract iron, but
16146-428: The remaining 49.16% came from its tertiary sector . As of 2018, the per capita disposable income of urban residents in the city is ¥37,183, which ranks third among prefecture-level divisions in Jiangxi (behind Nanchang and Xinyu ). Per capita disposable income for rural residents for 2018 is ¥16,510, which ranks fourth among prefecture-level divisions in Jiangxi (behind Pingxiang , Xinyu, and Nanchang). For 2018,
16284-558: The rulers was often challenged in civil wars by various royal family members in Qin and Chu. Once all these powerful rulers had firmly established themselves within their respective dominions, the bloodshed focused more fully on interstate conflict in the Warring States period, which began in 403 BCE when the three remaining elite families in Jin—Zhao, Wei, and Han—partitioned the state. After
16422-415: The same basic reaction, but a different electrolyte mixture. In 2002, more than 230,000 tons of manganese dioxide was used for this purpose. Copper alloys of manganese, such as Manganin , are commonly found in metal element shunt resistors used for measuring relatively large amounts of current. These alloys have very low temperature coefficient of resistance and are resistant to sulfur. This makes
16560-451: The six families were conferred the titles of viscounts and made ministers, each heading one of the six departments of Zhou dynasty government. From this point on, historians refer to "The Six Ministers" as the true power brokers of Jin. The same happened to Lu in 562, when the Three Huan divided the army into three parts and established their own separate spheres of influence. The heads of
16698-473: The sixth century CE, though it is named after the reign name of Emperor Zhenzong , in whose reign it became a major kiln site, around 1004. By the 14th century it had become the largest centre of production of Chinese porcelain, which it has remained, increasing its dominance in subsequent centuries. For several centuries, almost all top quality Chinese porcelain has come from the town. From the Ming period onwards, official kilns in Jingdezhen were controlled by
16836-456: The state was considered semi-barbarian and its rulers—beginning with King Wu in 704 BCE—proclaimed themselves kings in their own right. Chu intrusion into Zhou territory was checked several times by the other states, particularly in the major battles of Chengpu (632 BCE), Bi (595 BCE) and Yanling (575 BCE), which restored the states of Chen and Cai . Some version of the Five Classics existed in Spring and Autumn period, as characters in
16974-551: The sunniest season here, while autumn remains warm to mild and relatively dry. Extreme maximum temperatures of above 40 °C (104 °F) have been recorded, as have extreme minimums below −10 °C (14 °F). The city of Jingdezhen is divided into 4 county-level divisions : Zhushan District , Changjiang District , Fuliang County , and the county-level city of Leping . These 4 county-level divisions administer 52 township-level divisions , and 687 village-level divisions . Jingdezhen may have produced pottery as early as
17112-449: The three families were always among the department heads of Lu. Wu was a state in modern Jiangsu outside the Zhou cultural sphere, considered "barbarian", where the inhabitants sported short hair and tattoos and spoke an unintelligible language. Although its ruling house claimed to be a senior lineage in the Ji ancestral temple, Wu did not participate in the politics and wars of China until
17250-533: The throne , badly weakening the state so that it was no longer regarded as the hegemon. For nearly ten years, no ruler held the title. Duke Xiang of Song attempted to claim the hegemony in the wake of Qi's decline, perhaps driven by a desire to restore the Shang dynasty from which Song had descended. He hosted peace conferences in the same style as Qi had done, and conducted aggressive military campaigns against his rivals. Duke Xiang's ambitions met their end when, against
17388-424: The throne in 722. From this year on, the state of Lu kept an official chronicle, the Spring and Autumn Annals , which along with its commentaries is the standard source for the Spring and Autumn period. Corresponding chronicles are known to have existed in other states as well, but all but the Lu chronicle have been lost . In 717, Duke Zhuang of Zheng went to the capital for an audience with King Huan . During
17526-492: The title of bà (hegemon), giving Duke Huan royal authority in military ventures. An important basis for justifying Qi's dominance over the other states was presented in the slogan 'Revere the King, Expel the Barbarians' ( 尊王攘夷 ; zun wang rang yi ). The role of subsequent hegemons would also be framed in this way: as the primary defender and supporter of nominal Zhou authority and the existing order. Using this authority, during
17664-484: The title of bà . After the death of Duke Wen in 628, a growing tension manifested in interstate violence that turned smaller states, particularly those at the border between Jin and Chu, into sites of constant warfare; Qi and Qin also engaged in numerous interstate skirmishes with Jin or its allies to boost their own power. Duke Mu of Qin ascended the throne in 659 and forged an alliance with Jin by marrying his daughter to Duke Wen. In 624, he established hegemony over
17802-430: The twelve vassals) came together in regular conferences where they decided important matters, such as military expeditions against foreign groups or against offending nobles. During these conferences one vassal ruler was sometimes declared hegemon . As the era continued, larger and more powerful states annexed or claimed suzerainty over smaller ones. By the 6th century BCE, most small states had disappeared and just
17940-452: The various diplomatic activities, such as court visits paid by one ruler to another ( 朝 ; cháo ), meetings of officials or nobles of different states ( 會 ; 会 ; huì ), missions of friendly inquiries sent by the ruler of one state to another ( 聘 ; pìn ), emissaries sent from one state to another ( 使 ; shǐ ), and hunting parties attended by representatives of different states ( 狩 ; shou ). Because of Chu's non-Zhou origin,
18078-408: The versions edited by Liu Xin in the century following Sima Qian. While many philosophers such as Lao Tzu and Sun Tzu were active in the Spring and Autumn period, their ideas were probably not put into writing until the following Warring States period. While the aristocracy of the Western Zhou frequently interacted via the medium of the royal court, the collapse of central power at the end of
18216-589: The water. The dMn can then travel up to 4,000 km due to the microbial capsules present, preventing exchange with particles, lowing the sinking rates. Dissolved Mn concentrations are even higher when oxygen levels are low. Overall, dMn concentrations are normally higher in coastal regions and decrease when moving offshore. Manganese occurs in soils in three oxidation states: the divalent cation, Mn and as brownish-black oxides and hydroxides containing Mn (III,IV), such as MnOOH and MnO 2 . Soil pH and oxidation-reduction conditions affect which of these three forms of Mn
18354-515: The western Rong barbarians and became the most powerful lord of the time. However he did not chair any alliance with other states nor was he officially recognized as hegemon by the king. Therefore, not all sources accept him as one of the Five Hegemons. King Zhuang of Chu expanded the borders of Chu well north of the Yangtze River, threatening the Central States in modern Henan . At one point
18492-478: Was a large consumer of manganese ores. Scheele and others were aware that pyrolusite (mineral form of manganese dioxide) contained a new element. Johan Gottlieb Gahn isolated an impure sample of manganese metal in 1774, which he did by reducing the dioxide with carbon . The manganese content of some iron ores used in Greece led to speculations that steel produced from that ore contains additional manganese, making
18630-532: Was relegated to being merely a figurehead of the regional states and ritual leader of the Ji clan ancestral temple. Though the king retained the Mandate of Heaven , the title held little actual power. With the decline of Zhou power, the Yellow River drainage basin was divided into hundreds of small, autonomous states, most of them consisting of a single city, though a handful of multi-city states, particularly those on
18768-572: Was used for British military steel helmets and later by the U.S. military. Manganese is used in production of alloys with aluminium. Aluminium with roughly 1.5% manganese has increased resistance to corrosion through grains that absorb impurities which would lead to galvanic corrosion . The corrosion-resistant aluminium alloys 3004 and 3104 (0.8 to 1.5% manganese) are used for most beverage cans . Before 2000, more than 1.6 million tonnes of those alloys were used; at 1% manganese, this consumed 16,000 tonnes of manganese. Manganese(IV) oxide
18906-414: Was used in the original type of dry cell battery as an electron acceptor from zinc, and is the blackish material in carbon–zinc type flashlight cells. The manganese dioxide is reduced to the manganese oxide-hydroxide MnO(OH) during discharging, preventing the formation of hydrogen at the anode of the battery. The same material also functions in newer alkaline batteries (usually battery cells), which use
19044-438: Was used to decolorize glass. This female magnes was later called magnesia , known now in modern times as pyrolusite or manganese dioxide . Neither this mineral nor elemental manganese is magnetic. In the 16th century, manganese dioxide was called manganesum (note the two Ns instead of one) by glassmakers, possibly as a corruption and concatenation of two words, since alchemists and glassmakers eventually had to differentiate
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