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113-937: During the Spring and Autumn period , the area of present-day Fushan County belonged to the Jin State . The area would later become part of the Wei during the Warring States period . The area was part of the Qin dynasty , administered under Xiangling County  [ zh ] in the Hedong Commandery . Fushan County was first set up in 619 CE. In the Song dynasty , the area was part of Pingyang Prefecture  [ zh ] , but would briefly be placed in Jinning Circuit  [ zh ] during

226-434: A body-centered cubic (bcc) crystal structure . As it cools further to 1394 °C, it changes to its γ-iron allotrope, a face-centered cubic (fcc) crystal structure, or austenite . At 912 °C and below, the crystal structure again becomes the bcc α-iron allotrope. The physical properties of iron at very high pressures and temperatures have also been studied extensively, because of their relevance to theories about

339-430: A nuclear spin (− 1 ⁄ 2 ). The nuclide Fe theoretically can undergo double electron capture to Cr, but the process has never been observed and only a lower limit on the half-life of 4.4×10 years has been established. Fe is an extinct radionuclide of long half-life (2.6 million years). It is not found on Earth, but its ultimate decay product is its granddaughter, the stable nuclide Ni . Much of

452-499: A supernova for their formation, involving rapid neutron capture by starting Fe nuclei. In the far future of the universe, assuming that proton decay does not occur, cold fusion occurring via quantum tunnelling would cause the light nuclei in ordinary matter to fuse into Fe nuclei. Fission and alpha-particle emission would then make heavy nuclei decay into iron, converting all stellar-mass objects to cold spheres of pure iron. Iron's abundance in rocky planets like Earth

565-454: A distorted sodium chloride structure. The binary ferrous and ferric halides are well-known. The ferrous halides typically arise from treating iron metal with the corresponding hydrohalic acid to give the corresponding hydrated salts. Iron reacts with fluorine, chlorine, and bromine to give the corresponding ferric halides, ferric chloride being the most common. Ferric iodide is an exception, being thermodynamically unstable due to

678-555: 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

791-421: A land certificate or construction design. The construction department and the land department government had talked to them several times before it was pulled down." he denied any violence had taken place, and refused to give his name to reporters. Fushan County is located in the south of Shanxi Province , bordering Yaodu District and Xiangfen County to the west, Yicheng County to the south, Anze County to

904-553: A macroscopic piece of iron will have a nearly zero overall magnetic field. Application of an external magnetic field causes the domains that are magnetized in the same general direction to grow at the expense of adjacent ones that point in other directions, reinforcing the external field. This effect is exploited in devices that need to channel magnetic fields to fulfill design function, such as electrical transformers , magnetic recording heads, and electric motors . Impurities, lattice defects , or grain and particle boundaries can "pin"

1017-475: A mixture of O 2 /Ar. Iron(IV) is a common intermediate in many biochemical oxidation reactions. Numerous organoiron compounds contain formal oxidation states of +1, 0, −1, or even −2. The oxidation states and other bonding properties are often assessed using the technique of Mössbauer spectroscopy . Many mixed valence compounds contain both iron(II) and iron(III) centers, such as magnetite and Prussian blue ( Fe 4 (Fe[CN] 6 ) 3 ). The latter

1130-401: 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

1243-426: A number of significant mineral deposits, including iron , coal , gold , baryte , and clay . The county's iron ore reserves total 120 million tons, accounting for 60% of the total reserves of Linfen . The proven reserves of coal total 7.6 billion tons, the proven reserves of gold total 0.76 million tons, the proven reserves of limestone total 19.47 million tons, the proven reserves of baryte total 630,000 tons, and

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1356-471: A result, mercury is traded in standardized 76 pound flasks (34 kg) made of iron. Iron is by far the most reactive element in its group; it is pyrophoric when finely divided and dissolves easily in dilute acids, giving Fe . However, it does not react with concentrated nitric acid and other oxidizing acids due to the formation of an impervious oxide layer, which can nevertheless react with hydrochloric acid . High-purity iron, called electrolytic iron ,

1469-501: 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

1582-455: A type of rock consisting of repeated thin layers of iron oxides alternating with bands of iron-poor shale and chert . The banded iron formations were laid down in the time between 3,700  million years ago and 1,800  million years ago . Materials containing finely ground iron(III) oxides or oxide-hydroxides, such as ochre , have been used as yellow, red, and brown pigments since pre-historical times. They contribute as well to

1695-435: A very large coordination and organometallic chemistry : indeed, it was the discovery of an iron compound, ferrocene , that revolutionalized the latter field in the 1950s. Iron is sometimes considered as a prototype for the entire block of transition metals, due to its abundance and the immense role it has played in the technological progress of humanity. Its 26 electrons are arranged in the configuration [Ar]3d 4s , of which

1808-814: Is a chemical element ; it has the symbol Fe (from Latin ferrum  'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table . It is, by mass, the most common element on Earth , forming much of Earth's outer and inner core . It is the fourth most abundant element in the Earth's crust , being mainly deposited by meteorites in its metallic state. Extracting usable metal from iron ores requires kilns or furnaces capable of reaching 1,500 °C (2,730 °F), about 500 °C (932 °F) higher than that required to smelt copper . Humans started to master that process in Eurasia during

1921-630: Is also rarely found in basalts that have formed from magmas that have come into contact with carbon-rich sedimentary rocks, which have reduced the oxygen fugacity sufficiently for iron to crystallize. This is known as telluric iron and is described from a few localities, such as Disko Island in West Greenland, Yakutia in Russia and Bühl in Germany. Ferropericlase (Mg,Fe)O , a solid solution of periclase (MgO) and wüstite (FeO), makes up about 20% of

2034-407: Is considered to be resistant to rust, due to its oxide layer. Iron forms various oxide and hydroxide compounds ; the most common are iron(II,III) oxide (Fe 3 O 4 ), and iron(III) oxide (Fe 2 O 3 ). Iron(II) oxide also exists, though it is unstable at room temperature. Despite their names, they are actually all non-stoichiometric compounds whose compositions may vary. These oxides are

2147-495: Is due to its abundant production during the runaway fusion and explosion of type Ia supernovae , which scatters the iron into space. Metallic or native iron is rarely found on the surface of the Earth because it tends to oxidize. However, both the Earth's inner and outer core , which together account for 35% of the mass of the whole Earth, are believed to consist largely of an iron alloy, possibly with nickel . Electric currents in

2260-474: Is experimentally well defined for pressures less than 50 GPa. For greater pressures, published data (as of 2007) still varies by tens of gigapascals and over a thousand kelvin. Below its Curie point of 770 °C (1,420 °F; 1,040 K), α-iron changes from paramagnetic to ferromagnetic : the spins of the two unpaired electrons in each atom generally align with the spins of its neighbors, creating an overall magnetic field . This happens because

2373-443: Is in Earth's crust only amounts to about 5% of the overall mass of the crust and is thus only the fourth most abundant element in that layer (after oxygen , silicon , and aluminium ). Most of the iron in the crust is combined with various other elements to form many iron minerals . An important class is the iron oxide minerals such as hematite (Fe 2 O 3 ), magnetite (Fe 3 O 4 ), and siderite (FeCO 3 ), which are

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2486-401: Is not like that of Mn with its weak, spin-forbidden d–d bands, because Fe has higher positive charge and is more polarizing, lowering the energy of its ligand-to-metal charge transfer absorptions. Thus, all the above complexes are rather strongly colored, with the single exception of the hexaquo ion – and even that has a spectrum dominated by charge transfer in the near ultraviolet region. On

2599-595: 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

2712-407: Is possible, but nonetheless the sequence does effectively end at Ni because conditions in stellar interiors cause the competition between photodisintegration and the alpha process to favor photodisintegration around Ni. This Ni, which has a half-life of about 6 days, is created in quantity in these stars, but soon decays by two successive positron emissions within supernova decay products in

2825-458: 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

2938-548: Is somewhat different). Pieces of magnetite with natural permanent magnetization ( lodestones ) provided the earliest compasses for navigation. Particles of magnetite were extensively used in magnetic recording media such as core memories , magnetic tapes , floppies , and disks , until they were replaced by cobalt -based materials. Iron has four stable isotopes : Fe (5.845% of natural iron), Fe (91.754%), Fe (2.119%) and Fe (0.282%). Twenty-four artificial isotopes have also been created. Of these stable isotopes, only Fe has

3051-442: Is such a strong oxidizing agent that it oxidizes ammonia to nitrogen (N 2 ) and water to oxygen: The pale-violet hex aquo complex [Fe(H 2 O) 6 ] is an acid such that above pH 0 it is fully hydrolyzed: As pH rises above 0 the above yellow hydrolyzed species form and as it rises above 2–3, reddish-brown hydrous iron(III) oxide precipitates out of solution. Although Fe has a d configuration, its absorption spectrum

3164-502: Is supposed to have an orthorhombic or a double hcp structure. (Confusingly, the term "β-iron" is sometimes also used to refer to α-iron above its Curie point, when it changes from being ferromagnetic to paramagnetic, even though its crystal structure has not changed. ) The inner core of the Earth is generally presumed to consist of an iron- nickel alloy with ε (or β) structure. The melting and boiling points of iron, along with its enthalpy of atomization , are lower than those of

3277-418: Is thus very important economically, and iron is the cheapest metal, with a price of a few dollars per kilogram or pound. Pristine and smooth pure iron surfaces are a mirror-like silvery-gray. Iron reacts readily with oxygen and water to produce brown-to-black hydrated iron oxides , commonly known as rust . Unlike the oxides of some other metals that form passivating layers, rust occupies more volume than

3390-451: Is used as the traditional "blue" in blueprints . Iron is the first of the transition metals that cannot reach its group oxidation state of +8, although its heavier congeners ruthenium and osmium can, with ruthenium having more difficulty than osmium. Ruthenium exhibits an aqueous cationic chemistry in its low oxidation states similar to that of iron, but osmium does not, favoring high oxidation states in which it forms anionic complexes. In

3503-437: Is used in chemical actinometry and along with its sodium salt undergoes photoreduction applied in old-style photographic processes. The dihydrate of iron(II) oxalate has a polymeric structure with co-planar oxalate ions bridging between iron centres with the water of crystallisation located forming the caps of each octahedron, as illustrated below. Iron(III) complexes are quite similar to those of chromium (III) with

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3616-543: 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

3729-557: The 2nd millennium BC and the use of iron tools and weapons began to displace copper alloys – in some regions, only around 1200 BC. That event is considered the transition from the Bronze Age to the Iron Age . In the modern world , iron alloys, such as steel , stainless steel , cast iron and special steels , are by far the most common industrial metals, due to their mechanical properties and low cost. The iron and steel industry

3842-521: 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

3955-485: 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

4068-712: The Yuan dynasty . Upon the establishment of the Ming dynasty , the area would be re-organized as part of the Pingyang Prefecture, which it would remain under throughout the Ming dynasty as well as the Qing dynasty . During the Republic of China, the area was part of Hedong Circuit  [ zh ] . On September 13, 2009, county officials allegedly launched a raid against an unregistered church in

4181-482: 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

4294-432: The supernova remnant gas cloud, first to radioactive Co, and then to stable Fe. As such, iron is the most abundant element in the core of red giants , and is the most abundant metal in iron meteorites and in the dense metal cores of planets such as Earth . It is also very common in the universe, relative to other stable metals of approximately the same atomic weight . Iron is the sixth most abundant element in

4407-488: The trans - chlorohydridobis(bis-1,2-(diphenylphosphino)ethane)iron(II) complex is used as a starting material for compounds with the Fe( dppe ) 2 moiety . The ferrioxalate ion with three oxalate ligands displays helical chirality with its two non-superposable geometries labelled Λ (lambda) for the left-handed screw axis and Δ (delta) for the right-handed screw axis, in line with IUPAC conventions. Potassium ferrioxalate

4520-466: The universe , and the most common refractory element. Although a further tiny energy gain could be extracted by synthesizing Ni , which has a marginally higher binding energy than Fe, conditions in stars are unsuitable for this process. Element production in supernovas greatly favor iron over nickel, and in any case, Fe still has a lower mass per nucleon than Ni due to its higher fraction of lighter protons. Hence, elements heavier than iron require

4633-570: The 3d and 4s electrons are relatively close in energy, and thus a number of electrons can be ionized. Iron forms compounds mainly in the oxidation states +2 ( iron(II) , "ferrous") and +3 ( iron(III) , "ferric"). Iron also occurs in higher oxidation states , e.g., the purple potassium ferrate (K 2 FeO 4 ), which contains iron in its +6 oxidation state. The anion [FeO 4 ] with iron in its +7 oxidation state, along with an iron(V)-peroxo isomer, has been detected by infrared spectroscopy at 4 K after cocondensation of laser-ablated Fe atoms with

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4746-547: 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

4859-496: 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

4972-589: The Earth's surface. Items made of cold-worked meteoritic iron have been found in various archaeological sites dating from a time when iron smelting had not yet been developed; and the Inuit in Greenland have been reported to use iron from the Cape York meteorite for tools and hunting weapons. About 1 in 20 meteorites consist of the unique iron-nickel minerals taenite (35–80% iron) and kamacite (90–95% iron). Native iron

5085-532: 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

5198-534: 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

5311-555: 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

5424-545: 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

5537-546: 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

5650-675: 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

5763-422: 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 ,

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5876-399: 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

5989-543: 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

6102-450: The brown deposits present in a sizeable number of streams. Due to its electronic structure, iron has a very large coordination and organometallic chemistry. Many coordination compounds of iron are known. A typical six-coordinate anion is hexachloroferrate(III), [FeCl 6 ] , found in the mixed salt tetrakis(methylammonium) hexachloroferrate(III) chloride . Complexes with multiple bidentate ligands have geometric isomers . For example,

6215-683: The color of various rocks and clays , including entire geological formations like the Painted Hills in Oregon and the Buntsandstein ("colored sandstone", British Bunter ). Through Eisensandstein (a jurassic 'iron sandstone', e.g. from Donzdorf in Germany) and Bath stone in the UK, iron compounds are responsible for the yellowish color of many historical buildings and sculptures. The proverbial red color of

6328-464: The cores of the Earth and other planets. Above approximately 10 GPa and temperatures of a few hundred kelvin or less, α-iron changes into another hexagonal close-packed (hcp) structure, which is also known as ε-iron . The higher-temperature γ-phase also changes into ε-iron, but does so at higher pressure. Some controversial experimental evidence exists for a stable β phase at pressures above 50 GPa and temperatures of at least 1500 K. It

6441-435: The county's seat of government, and Xiangshuihe  [ zh ] . The county's seven townships are Zhangzhuang Township  [ zh ] , Dongzhang Township  [ zh ] , Huainian Township  [ zh ] , Beiwang Township  [ zh ] , Beihan Township  [ zh ] , Mijiayuan Township  [ zh ] , and Zhaigeta Township  [ zh ] . Fushan County has

6554-452: The county, stating that the church was built illegally. According to the group ChinaAid , several worshipers were struck, and some of them were taken to hospital. The building was destroyed, and various people involved with the church were detained. A county executive officer said that, as the church was not licensed, one could not say that it was a "place of worship", but the issue was merely a matter of demolishing an illegal structure "without

6667-419: 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

6780-401: The domains in the new positions, so that the effect persists even after the external field is removed – thus turning the iron object into a (permanent) magnet . Similar behavior is exhibited by some iron compounds, such as the ferrites including the mineral magnetite , a crystalline form of the mixed iron(II,III) oxide Fe 3 O 4 (although the atomic-scale mechanism, ferrimagnetism ,

6893-514: 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

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7006-479: The earlier 3d elements from scandium to chromium , showing the lessened contribution of the 3d electrons to metallic bonding as they are attracted more and more into the inert core by the nucleus; however, they are higher than the values for the previous element manganese because that element has a half-filled 3d sub-shell and consequently its d-electrons are not easily delocalized. This same trend appears for ruthenium but not osmium . The melting point of iron

7119-586: The east, Gu County to the north, and Qinshui County to the southeast. The county varies in altitude from 650 meters in height to 1,511.8 meters in height. The annual average temperature in Fushan County is 11.2 °C, the annual average frost-free period is 191 days, the annual average precipitation is 534.2 millimeters, and the average amount of sunshine per year totals 2,298.8 hours. Fushan County has two towns and seven townships . The county's two towns are Tiantan  [ zh ] , which serves as

7232-451: 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

7345-421: 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

7458-473: 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

7571-507: 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

7684-406: The exception of iron(III)'s preference for O -donor instead of N -donor ligands. The latter tend to be rather more unstable than iron(II) complexes and often dissociate in water. Many Fe–O complexes show intense colors and are used as tests for phenols or enols . For example, in the ferric chloride test , used to determine the presence of phenols, iron(III) chloride reacts with a phenol to form

7797-527: 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

7910-414: 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

8023-499: 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

8136-545: 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

8249-462: The global stock of iron in use in society is 2,200 kg per capita. More-developed countries differ in this respect from less-developed countries (7,000–14,000 vs 2,000 kg per capita). Ocean science demonstrated the role of the iron in the ancient seas in both marine biota and climate. Iron shows the characteristic chemical properties of the transition metals , namely the ability to form variable oxidation states differing by steps of one and

8362-449: 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

8475-725: 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

8588-530: 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

8701-481: 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. Iron Iron

8814-488: 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

8927-434: 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,

9040-449: The liquid outer core are believed to be the origin of the Earth's magnetic field . The other terrestrial planets ( Mercury , Venus , and Mars ) as well as the Moon are believed to have a metallic core consisting mostly of iron. The M-type asteroids are also believed to be partly or mostly made of metallic iron alloy. The rare iron meteorites are the main form of natural metallic iron on

9153-446: The literature, this mineral phase of the lower mantle is also often called magnesiowüstite. Silicate perovskite may form up to 93% of the lower mantle, and the magnesium iron form, (Mg,Fe)SiO 3 , is considered to be the most abundant mineral in the Earth, making up 38% of its volume. While iron is the most abundant element on Earth, most of this iron is concentrated in the inner and outer cores. The fraction of iron that

9266-407: The major ores of iron . Many igneous rocks also contain the sulfide minerals pyrrhotite and pentlandite . During weathering , iron tends to leach from sulfide deposits as the sulfate and from silicate deposits as the bicarbonate. Both of these are oxidized in aqueous solution and precipitate in even mildly elevated pH as iron(III) oxide . Large deposits of iron are banded iron formations ,

9379-775: The metal and thus flakes off, exposing more fresh surfaces for corrosion. Chemically, the most common oxidation states of iron are iron(II) and iron(III) . Iron shares many properties of other transition metals, including the other group 8 elements , ruthenium and osmium . Iron forms compounds in a wide range of oxidation states , −4 to +7. Iron also forms many coordination compounds ; some of them, such as ferrocene , ferrioxalate , and Prussian blue have substantial industrial, medical, or research applications. The body of an adult human contains about 4 grams (0.005% body weight) of iron, mostly in hemoglobin and myoglobin . These two proteins play essential roles in oxygen transport by blood and oxygen storage in muscles . To maintain

9492-606: The meteorites Semarkona and Chervony Kut, a correlation between the concentration of Ni, the granddaughter of Fe, and the abundance of the stable iron isotopes provided evidence for the existence of Fe at the time of formation of the Solar System . Possibly the energy released by the decay of Fe, along with that released by Al , contributed to the remelting and differentiation of asteroids after their formation 4.6 billion years ago. The abundance of Ni present in extraterrestrial material may bring further insight into

9605-446: 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

9718-497: 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

9831-559: The necessary levels, human iron metabolism requires a minimum of iron in the diet. Iron is also the metal at the active site of many important redox enzymes dealing with cellular respiration and oxidation and reduction in plants and animals. At least four allotropes of iron (differing atom arrangements in the solid) are known, conventionally denoted α , γ , δ , and ε . The first three forms are observed at ordinary pressures. As molten iron cools past its freezing point of 1538 °C, it crystallizes into its δ allotrope, which has

9944-513: 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

10057-436: The orbitals of those two electrons (d z and d x − y ) do not point toward neighboring atoms in the lattice, and therefore are not involved in metallic bonding. In the absence of an external source of magnetic field, the atoms get spontaneously partitioned into magnetic domains , about 10 micrometers across, such that the atoms in each domain have parallel spins, but some domains have other orientations. Thus

10170-533: The origin and early history of the Solar System . The most abundant iron isotope Fe is of particular interest to nuclear scientists because it represents the most common endpoint of nucleosynthesis . Since Ni (14 alpha particles ) is easily produced from lighter nuclei in the alpha process in nuclear reactions in supernovae (see silicon burning process ), it is the endpoint of fusion chains inside extremely massive stars . Although adding more alpha particles

10283-444: The other hand, the pale green iron(II) hexaquo ion [Fe(H 2 O) 6 ] does not undergo appreciable hydrolysis. Carbon dioxide is not evolved when carbonate anions are added, which instead results in white iron(II) carbonate being precipitated out. In excess carbon dioxide this forms the slightly soluble bicarbonate, which occurs commonly in groundwater, but it oxidises quickly in air to form iron(III) oxide that accounts for

10396-581: The oxidizing power of Fe and the high reducing power of I : Ferric iodide, a black solid, is not stable in ordinary conditions, but can be prepared through the reaction of iron pentacarbonyl with iodine and carbon monoxide in the presence of hexane and light at the temperature of −20 °C, with oxygen and water excluded. Complexes of ferric iodide with some soft bases are known to be stable compounds. The standard reduction potentials in acidic aqueous solution for some common iron ions are given below: The red-purple tetrahedral ferrate (VI) anion

10509-497: The past work on isotopic composition of iron has focused on the nucleosynthesis of Fe through studies of meteorites and ore formation. In the last decade, advances in mass spectrometry have allowed the detection and quantification of minute, naturally occurring variations in the ratios of the stable isotopes of iron. Much of this work is driven by the Earth and planetary science communities, although applications to biological and industrial systems are emerging. In phases of

10622-422: 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;

10735-414: The principal ores for the production of iron (see bloomery and blast furnace). They are also used in the production of ferrites , useful magnetic storage media in computers, and pigments. The best known sulfide is iron pyrite (FeS 2 ), also known as fool's gold owing to its golden luster. It is not an iron(IV) compound, but is actually an iron(II) polysulfide containing Fe and S 2 ions in

10848-736: The proven reserves of refractory clay total 839,000 tons. The Linfen Central-South railway, the Houma–Yueshan railway , and the Datong–Puzhou railway all pass through Fushan County. National Highway 208 , National Highway 309 , and the Changlin Expressway  [ zh ] section of the G22 Qingdao–Lanzhou Expressway all pass through Fushan County. Spring and Autumn period The Spring and Autumn period ( c.  770  – c.  481 BCE )

10961-558: 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

11074-437: The second half of the 3d transition series, vertical similarities down the groups compete with the horizontal similarities of iron with its neighbors cobalt and nickel in the periodic table, which are also ferromagnetic at room temperature and share similar chemistry. As such, iron, cobalt, and nickel are sometimes grouped together as the iron triad . Unlike many other metals, iron does not form amalgams with mercury . As

11187-451: 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

11300-456: 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

11413-547: The surface of Mars is derived from an iron oxide-rich regolith . Significant amounts of iron occur in the iron sulfide mineral pyrite (FeS 2 ), but it is difficult to extract iron from it and it is therefore not exploited. In fact, iron is so common that production generally focuses only on ores with very high quantities of it. According to the International Resource Panel 's Metal Stocks in Society report ,

11526-449: 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

11639-533: 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

11752-424: 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

11865-492: 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

11978-484: 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

12091-430: 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

12204-452: 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,

12317-408: 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

12430-455: The volume of the lower mantle of the Earth, which makes it the second most abundant mineral phase in that region after silicate perovskite (Mg,Fe)SiO 3 ; it also is the major host for iron in the lower mantle. At the bottom of the transition zone of the mantle, the reaction γ- (Mg,Fe) 2 [SiO 4 ] ↔ (Mg,Fe)[SiO 3 ] + (Mg,Fe)O transforms γ-olivine into a mixture of silicate perovskite and ferropericlase and vice versa. In

12543-515: 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

12656-692: Was a period in Chinese history corresponding roughly to the first half of the Eastern Zhou ( c.  771  – 256 BCE), characterized by 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

12769-532: 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

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