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93-517: The villages of Dolní Bušínov, Hněvkov, Pivonín and Václavov are administrative parts of Zábřeh. Dolní Bušínov and Hněvkov form two exclaves of the municipal territory. The name Zábřeh is derived from za břehem , meaning "behind the riverbank". It is a reference to the river which flows through the town. The former German name Hohenstadt means "high town". Zábřeh is located about 11 kilometres (7 mi) southwest of Šumperk and 41 km (25 mi) northwest of Olomouc . The eastern half of

186-409: A condenser . Some alchemists called this zinc oxide lana philosophica , Latin for "philosopher's wool", because it collected in wooly tufts, whereas others thought it looked like white snow and named it nix album . The name of the metal was probably first documented by Paracelsus , a Swiss-born German alchemist, who referred to the metal as "zincum" or "zinken" in his book Liber Mineralium II , in

279-428: A gamma ray . Zn has three excited metastable states and Zn has two. The isotopes Zn , Zn , Zn and Zn each have only one excited metastable state. The most common decay mode of a radioisotope of zinc with a mass number lower than 66 is electron capture . The decay product resulting from electron capture is an isotope of copper. The most common decay mode of

372-514: A by-product of smelting sulfide ores. Zinc in such remnants in smelting ovens was usually discarded as it was thought to be worthless. The manufacture of brass was known to the Romans by about 30 BC. They made brass by heating powdered calamine (zinc silicate or carbonate), charcoal and copper together in a crucible. The resulting calamine brass was then either cast or hammered into shape for use in weaponry. Some coins struck by Romans in

465-547: A deficit of zinc can compromise the vitality of primary algal communities, potentially destabilizing the intricate marine trophic structures and consequently impacting biodiversity. Brass , an alloy of copper and zinc in various proportions, was used as early as the third millennium BC in the Aegean area and the region which currently includes Iraq , the United Arab Emirates , Kalmykia , Turkmenistan and Georgia . In

558-416: A discontinuity on land, such as in the case of Point Roberts. Along rivers that change course, pene-enclaves can be observed as complexes comprising many small pene-enclaves. A pene-enclave can also exist entirely on land, such as when intervening mountains render a territory, although geographically attached, inaccessible from other parts of a country except through alien territory. A commonly cited example

651-400: A half-life of 243.66 days, is the least active radioisotope, followed by Zn with a half-life of 46.5 hours. Zinc has 10 nuclear isomers , of which Zn has the longest half-life, 13.76 h. The superscript m indicates a metastable isotope. The nucleus of a metastable isotope is in an excited state and will return to the ground state by emitting a photon in the form of

744-421: A key). Originally, it was a term of property law that denoted the situation of a land or parcel of land surrounded by land owned by a different owner, and that could not be reached for its exploitation in a practical and sufficient manner without crossing the surrounding land. In law, this created a servitude of passage for the benefit of the owner of the surrounded land. The first diplomatic document to contain

837-506: A metal which, when oxidized, produces pushpanjan , thought to be zinc oxide. Zinc mines at Zawar, near Udaipur in India, have been active since the Mauryan period ( c.  322 and 187 BCE). The smelting of metallic zinc here, however, appears to have begun around the 12th century AD. One estimate is that this location produced an estimated million tonnes of metallic zinc and zinc oxide from

930-417: A metal–carbon sigma bond . Cobalticyanide paper (Rinnmann's test for Zn) can be used as a chemical indicator for zinc. 4 g of K 3 Co(CN) 6 and 1 g of KClO 3 is dissolved on 100 ml of water. Paper is dipped in the solution and dried at 100 °C. One drop of the sample is dropped onto the dry paper and heated. A green disc indicates the presence of zinc. Various isolated examples of

1023-410: A new replacement site. The same possible curtailments and alterations never apply to proper exclaves. Zinc alloy Zinc is a chemical element with the symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table . In some respects, zinc

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1116-677: A part of a sovereign state (like the Kaliningrad Oblast ). A pene-exclave is a part of the territory of one country that can be conveniently approached – in particular, by wheeled traffic – only through the territory of another country. Pene-exclaves are also called functional exclaves or practical exclaves. Many pene-exclaves partially border their own territorial waters (i.e., they are not surrounded by other nations' territorial waters), such as Point Roberts, Washington , and Minnesota's Northwest Angle . A pene-exclave can also exist entirely on land, such as when intervening mountains render

1209-505: A process in 1758 for calcining zinc sulfide into an oxide usable in the retort process. Prior to this, only calamine could be used to produce zinc. In 1798, Johann Christian Ruberg improved on the smelting process by building the first horizontal retort smelter. Jean-Jacques Daniel Dony built a different kind of horizontal zinc smelter in Belgium that processed even more zinc. Italian doctor Luigi Galvani discovered in 1780 that connecting

1302-522: A quantitative principle applies: the land boundary must be longer than the coastline. Thus a state is classified as a sovereign semi-enclave if it borders on just one state, and its land boundary is longer than its sea coastline. (Since Vinokurov's writing in 2007, Canada and the Kingdom of Denmark have each gained a second bordering state — each other — with the 2022 division of Hans Island .) Vinokurov affirms that "no similar quantitative criterion

1395-582: A quantity of what he called "calay" (from the Malay or Hindi word for tin) originating from Malabar off a cargo ship captured from the Portuguese in the year 1596. Libavius described the properties of the sample, which may have been zinc. Zinc was regularly imported to Europe from the Orient in the 17th and early 18th centuries, but was at times very expensive. Metallic zinc was isolated in India by 1300 AD. Before it

1488-401: A radioisotope of zinc with mass number higher than 66 is beta decay (β ), which produces an isotope of gallium . Zinc has an electron configuration of [Ar]3d 4s and is a member of the group 12 of the periodic table . It is a moderately reactive metal and strong reducing agent . The surface of the pure metal tarnishes quickly, eventually forming a protective passivating layer of

1581-521: A territory comprises both land territory and territorial waters. In the case of enclaves in territorial waters, they are called maritime (those surrounded by territorial sea) or lacustrine (if in a lake) enclaves. Most of the true national-level enclaves now existing are in Asia and Europe. While subnational enclaves are numerous the world over, there are only a few national-level true enclaves in Africa, Australia and

1674-465: A territory inaccessible from other parts of a country except through alien territory. A commonly cited example is the Kleinwalsertal , a valley part of Vorarlberg , Austria, that is accessible only from Germany to the north. The word enclave is French and first appeared in the mid-15th century as a derivative of the verb enclaver (1283), from the colloquial Latin inclavare (to close with

1767-403: Is a chalcophile , meaning the element is more likely to be found in minerals together with sulfur and other heavy chalcogens , rather than with the light chalcogen oxygen or with non-chalcogen electronegative elements such as the halogens . Sulfides formed as the crust solidified under the reducing conditions of the early Earth's atmosphere. Sphalerite , which is a form of zinc sulfide,

1860-490: Is a logically extended back-formation of enclave . Enclaves exist for a variety of historical , political and geographical reasons. For example, in the feudal system in Europe, the ownership of feudal domains was often transferred or partitioned, either through purchase and sale or through inheritance, and often such domains were or came to be surrounded by other domains. In particular, this state of affairs persisted into

1953-870: Is a portion of a state or district geographically separated from the main part, by some surrounding alien territory. Many exclaves are also enclaves, but an exclave surrounded by the territory of more than one state is not an enclave. The Azerbaijani exclave of Nakhchivan is an example of an exclave that is not an enclave, as it borders Armenia , Turkey and Iran . Semi-enclaves and semi-exclaves are areas that, except for possessing an unsurrounded sea border (a coastline contiguous with international waters ), would otherwise be enclaves or exclaves. Semi-enclaves and enclaves are mutually exclusive. Likewise, semi-exclaves and exclaves are mutually exclusive. Enclaves and semi-enclaves can exist as independent states ( Monaco , The Gambia and Brunei are semi-enclaves), while exclaves and semi-exclaves proper always constitute just

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2046-408: Is also a production plant of one of the largest Czech dairies, OLMA, owned by Agrofert . Fresh milk is processed here. Zábřeh is situated in fertile lowland which is used for agricultural production. Maize, wheat, oilseed rape , poppy and fodder plant are grown. A tall silo is situated on the outskirts of the town. The international railway corridor Prague –Zábřeh– Ostrava – Warsaw runs along

2139-601: Is also an essential nutrient element for coral growth as it is an important cofactor for many enzymes. Zinc deficiency affects about two billion people in the developing world and is associated with many diseases. In children, deficiency causes growth retardation, delayed sexual maturation, infection susceptibility, and diarrhea . Enzymes with a zinc atom in the reactive center are widespread in biochemistry, such as alcohol dehydrogenase in humans. Consumption of excess zinc may cause ataxia , lethargy , and copper deficiency . In marine biomes, notably within polar regions,

2232-534: Is being smelted. In Britain, John Lane is said to have carried out experiments to smelt zinc, probably at Landore , prior to his bankruptcy in 1726. In 1738 in Great Britain, William Champion patented a process to extract zinc from calamine in a vertical retort -style smelter. His technique resembled that used at Zawar zinc mines in Rajasthan , but no evidence suggests he visited the Orient. Champion's process

2325-407: Is both an exclave of A and an enclave from the viewpoint of B. The singular territory D, although an enclave, is not an exclave. An enclave is a part of the territory of a state that is enclosed within the territory of another state. To distinguish the parts of a state entirely enclosed in a single other state, they are called true enclaves . A true enclave cannot be reached without passing through

2418-602: Is chemically similar to magnesium : both elements exhibit only one normal oxidation state (+2), and the Zn and Mg ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes . The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc

2511-527: Is hard and brittle at most temperatures but becomes malleable between 100 and 150 °C. Above 210 °C, the metal becomes brittle again and can be pulverized by beating. Zinc is a fair conductor of electricity . For a metal, zinc has relatively low melting (419.5 °C) and boiling point (907 °C). The melting point is the lowest of all the d-block metals aside from mercury and cadmium ; for this reason among others, zinc, cadmium, and mercury are often not considered to be transition metals like

2604-464: Is implicated by the formation of a yellow diamagnetic glass by dissolving metallic zinc in molten ZnCl 2 . The [Zn 2 ] core would be analogous to the [Hg 2 ] cation present in mercury (I) compounds. The diamagnetic nature of the ion confirms its dimeric structure. The first zinc(I) compound containing the Zn–Zn bond, (η -C 5 Me 5 ) 2 Zn 2 . Binary compounds of zinc are known for most of

2697-410: Is known as Special High Grade, often abbreviated SHG , and is 99.995% pure. Worldwide, 95% of new zinc is mined from sulfidic ore deposits, in which sphalerite (ZnS) is nearly always mixed with the sulfides of copper, lead and iron. Zinc mines are scattered throughout the world, with the main areas being China, Australia, and Peru. China produced 38% of the global zinc output in 2014. Zinc metal

2790-511: Is necessary for the leaching process. If deposits of zinc carbonate , zinc silicate , or zinc-spinel (like the Skorpion Deposit in Namibia ) are used for zinc production, the roasting can be omitted. For further processing two basic methods are used: pyrometallurgy or electrowinning . Pyrometallurgy reduces zinc oxide with carbon or carbon monoxide at 950 °C (1,740 °F) into

2883-478: Is needed to define the scope of non-sovereign semi-enclaves/exclaves." Sometimes, administrative divisions of a country, for historical or practical reasons, caused some areas to belong to one division while being attached to another. The term pene -exclave was defined in Robinson (1959) as "parts of the territory of one country that can be approached conveniently – in particular by wheeled traffic – only through

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2976-401: Is often used as a synonym for enclave (such as "the pockets of Puducherry district"). In British administrative history, subnational enclaves were usually called detachments or detached parts , and national enclaves as detached districts or detached dominions . In British ecclesiastic history, subnational enclaves were known as peculiars (see also royal peculiar ). The word exclave

3069-437: Is produced using extractive metallurgy . The ore is finely ground, then put through froth flotation to separate minerals from gangue (on the property of hydrophobicity ), to get a zinc sulfide ore concentrate consisting of about 50% zinc, 32% sulfur, 13% iron, and 5% SiO 2 . Roasting converts the zinc sulfide concentrate to zinc oxide: The sulfur dioxide is used for the production of sulfuric acid, which

3162-409: Is refined by froth flotation of the ore, roasting , and final extraction using electricity ( electrowinning ). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It is the second most abundant trace metal in humans after iron and it is the only metal which appears in all enzyme classes . Zinc

3255-475: Is the Kleinwalsertal , a valley part of Vorarlberg , Austria, that is only accessible from Germany to the north, being separated from the rest of Austria by high mountains traversed by no roads. Another example is the Spanish village of Os de Civís , accessible from Andorra. Hence, such areas are enclaves or exclaves for practical purposes , without meeting the strict definition. Many pene-exclaves partially border

3348-532: Is the most heavily mined zinc-containing ore because its concentrate contains 60–62% zinc. Other source minerals for zinc include smithsonite (zinc carbonate ), hemimorphite (zinc silicate ), wurtzite (another zinc sulfide), and sometimes hydrozincite (basic zinc carbonate ). With the exception of wurtzite, all these other minerals were formed by weathering of the primordial zinc sulfides. Identified world zinc resources total about 1.9–2.8 billion tonnes . Large deposits are in Australia, Canada and

3441-469: The metalloids and all the nonmetals except the noble gases . The oxide ZnO is a white powder that is nearly insoluble in neutral aqueous solutions, but is amphoteric , dissolving in both strong basic and acidic solutions. The other chalcogenides ( ZnS , ZnSe , and ZnTe ) have varied applications in electronics and optics. Pnictogenides ( Zn 3 N 2 , Zn 3 P 2 , Zn 3 As 2 and Zn 3 Sb 2 ),

3534-518: The spinal cord of a freshly dissected frog to an iron rail attached by a brass hook caused the frog's leg to twitch. He incorrectly thought he had discovered an ability of nerves and muscles to create electricity and called the effect " animal electricity ". The galvanic cell and the process of galvanization were both named for Luigi Galvani, and his discoveries paved the way for electrical batteries , galvanization, and cathodic protection . Galvani's friend, Alessandro Volta , continued researching

3627-403: The 12th to 16th centuries. Another estimate gives a total production of 60,000 tonnes of metallic zinc over this period. The Rasaratna Samuccaya , written in approximately the 13th century AD, mentions two types of zinc-containing ores: one used for metal extraction and another used for medicinal purposes. Zinc was distinctly recognized as a metal under the designation of Yasada or Jasada in

3720-610: The 16th century. The word is probably derived from the German zinke , and supposedly meant "tooth-like, pointed or jagged" (metallic zinc crystals have a needle-like appearance). Zink could also imply "tin-like" because of its relation to German zinn meaning tin. Yet another possibility is that the word is derived from the Persian word سنگ seng meaning stone. The metal was also called Indian tin , tutanego , calamine , and spinter . German metallurgist Andreas Libavius received

3813-591: The 19th century in the Holy Roman Empire , and these domains (principalities, etc.) exhibited many of the characteristics of sovereign states. Prior to 1866 Prussia alone consisted of more than 270 discontiguous pieces of territory. Residing in an enclave within another country has often involved difficulties in such areas as passage rights, importing goods, currency, provision of utilities and health services, and host nation cooperation. Thus, over time, enclaves have tended to be eliminated. For example, two-thirds of

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3906-422: The 24th most abundant element. It also makes up 312 ppm of the solar system, where it is the 22nd most abundant element. Typical background concentrations of zinc do not exceed 1 μg/m in the atmosphere; 300 mg/kg in soil; 100 mg/kg in vegetation; 20 μg/L in freshwater and 5 μg/L in seawater. The element is normally found in association with other base metals such as copper and lead in ores . Zinc

3999-443: The 9th century AD when a distillation process was employed to make pure zinc. Alchemists burned zinc in air to form what they called " philosopher's wool " or "white snow". The element was probably named by the alchemist Paracelsus after the German word Zinke (prong, tooth). German chemist Andreas Sigismund Marggraf is credited with discovering pure metallic zinc in 1746. Work by Luigi Galvani and Alessandro Volta uncovered

4092-725: The Americas (each such enclave being surrounded by the territorial waters of another country). A historical example is West Berlin before the reunification of Germany . Since 1945, all of Berlin had been ruled de jure by the four Allied powers. However, the East German government and the Soviet Union treated East Berlin as an integral part of East Germany, so West Berlin was a de facto enclave within East Germany . Also, 12 small West Berlin enclaves, such as Steinstücken , were separated from

4185-562: The Baroque wing of the castle was sold by Prince Aloys II of Liechtenstein to the town of Zábřeh. After a devastating fire at the end of the 18th century, almost all the houses had to be rebuilt. In the first half 19th century, the Prague–Olomouc railway was built through the town, and thus the current appearance of the town was created. After the railway station was built after 1845, Zábřeh became an important commercial and industrial centre of

4278-561: The Christian era are made of what is probably calamine brass. The oldest known pills were made of the zinc carbonates hydrozincite and smithsonite. The pills were used for sore eyes and were found aboard the Roman ship Relitto del Pozzino , wrecked in 140 BC. The Berne zinc tablet is a votive plaque dating to Roman Gaul made of an alloy that is mostly zinc. The Charaka Samhita , thought to have been written between 300 and 500 AD, mentions

4371-464: The Gambia and Brunei . Vinokurov (2007) declares, "Technically, Portugal , Denmark , and Canada also border only one foreign state, but they are not enclosed in the geographical, political, or economic sense. They have vast access to international waters. At the same time, there are states that, although in possession of sea access, are still enclosed by the territories of a foreign state." Therefore,

4464-582: The German industrialist Wilhelm Brass after 1870. After the World War II, the factory was nationalised and joined to the Perla national company. The textile production ended here in 2005. Today, no major industrial companies are based in Zábřeh. The largest industrial company is HDO, which processes zinc alloy . The Sulko factory produces plastic windows and doors. Part of the production is exported to west Europe. There

4557-629: The Moravská Sázava. The town's main railway station is named Zábřeh na Moravě (literally "Zábřeh in Moravia ") to distinguish it from the eponymous station in Dolní Benešov . There is also a railway station of local significance, Zábřeh na Moravě zastávka . Zábřeh is located in the Haná ethnographic region. The main landmark of Zábřeh is the castle. Since 1991, it has been used as the municipal office. In

4650-474: The United States, with the largest reserves in Iran . The most recent estimate of reserve base for zinc (meets specified minimum physical criteria related to current mining and production practices) was made in 2009 and calculated to be roughly 480 Mt. Zinc reserves, on the other hand, are geologically identified ore bodies whose suitability for recovery is economically based (location, grade, quality, and quantity) at

4743-419: The basic zinc carbonate , Zn 5 (OH) 6 (CO 3 ) 2 , by reaction with atmospheric carbon dioxide . Zinc burns in air with a bright bluish-green flame, giving off fumes of zinc oxide . Zinc reacts readily with acids , alkalis and other non-metals. Extremely pure zinc reacts only slowly at room temperature with acids. Strong acids, such as hydrochloric or sulfuric acid , can remove

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4836-420: The chromate ZnCrO 4 (one of the few colored zinc compounds) are a few examples of other common inorganic compounds of zinc. Organozinc compounds are those that contain zinc– carbon covalent bonds. Diethylzinc ( (C 2 H 5 ) 2 Zn ) is a reagent in synthetic chemistry. It was first reported in 1848 from the reaction of zinc and ethyl iodide , and was the first compound known to contain

4929-476: The city, some by only a few meters. True exclave is an extension of the concept of true enclave . In order to access a true exclave from the mainland, a traveller must go through the territory of at least one other state. Semi-enclaves and semi-exclaves are areas that, except for possessing an unsurrounded sea border, would otherwise be enclaves or exclaves. Semi-enclaves can exist as independent states that border only one other state, such as Monaco ,

5022-464: The country. Zábřeh became a border town of the linguistic border between German and Czech. In 1880, the town's majority was German-speaking, but after the Czech's successful claim to the whole of Bohemia, the town's majority was Czech-speaking by 1930. Zábřeh was historically a centre of textile industry profiting from its location next to the international railway. The large dyeing plant was founded here by

5115-555: The effect and invented the Voltaic pile in 1800. Volta's pile consisted of a stack of simplified galvanic cells , each being one plate of copper and one of zinc connected by an electrolyte . By stacking these units in series, the Voltaic pile (or "battery") as a whole had a higher voltage, which could be used more easily than single cells. Electricity is produced because the Volta potential between

5208-533: The electrochemical properties of zinc by 1800. Corrosion -resistant zinc plating of iron ( hot-dip galvanizing ) is the major application for zinc. Other applications are in electrical batteries , small non-structural castings, and alloys such as brass. A variety of zinc compounds are commonly used, such as zinc carbonate and zinc gluconate (as dietary supplements), zinc chloride (in deodorants), zinc pyrithione (anti- dandruff shampoos), zinc sulfide (in luminescent paints), and dimethylzinc or diethylzinc in

5301-580: The enclave and exclave system in Baarle . As both Netherlands and Belgium are members of the European Union and Schengen Area , people, goods and services flow freely with little or no restrictions. For illustration, in the figure (above), A1 is a semi-enclave (attached to C and also bounded by water that only touches C's territorial water). Although A2 is an exclave of A, it cannot be classed as an enclave because it shares borders with B and C. The territory A3

5394-402: The enforced reduction of scope of a foreign embassy has always been a possibility, even to the point of expelling the foreign embassy entirely, usually on a breakdown of relations, in reaction to extreme actions such as espionage , or as another form of sanction. The same seems to be possible in profit-driven moving or drilling under any of the sites below, providing safeguards as the structure or

5487-439: The formation of Zn 2 Cl 2 , a zinc compound with a +1 oxidation state. No compounds of zinc in positive oxidation states other than +1 or +2 are known. Calculations indicate that a zinc compound with the oxidation state of +4 is unlikely to exist. Zn(III) is predicted to exist in the presence of strongly electronegative trianions; however, there exists some doubt around this possibility. But in 2021 another compound

5580-461: The hydroxide Zn(OH) 2 forms as a white precipitate . In stronger alkaline solutions, this hydroxide is dissolved to form zincates ( [Zn(OH) 4 ] ). The nitrate Zn(NO 3 ) 2 , chlorate Zn(ClO 3 ) 2 , sulfate ZnSO 4 , phosphate Zn 3 (PO 4 ) 2 , molybdate ZnMoO 4 , cyanide Zn(CN) 2 , arsenite Zn(AsO 2 ) 2 , arsenate Zn(AsO 4 ) 2 ·8H 2 O and

5673-455: The medical Lexicon ascribed to the Hindu king Madanapala (of Taka dynasty) and written about the year 1374. Smelting and extraction of impure zinc by reducing calamine with wool and other organic substances was accomplished in the 13th century in India. The Chinese did not learn of the technique until the 17th century. Alchemists burned zinc metal in air and collected the resulting zinc oxide on

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5766-461: The middle of the town square are a plague column from 1713 and a late Baroque fountain from 1829. The parish Church of Saint Bartholomew was founded in the mid-13th century. Due to its poor condition it was demolished in 1750 and in 1754 the current baroque church was built in its site. The church tower houses a parish museum with displays of liturgical objects and a presentation on the history of bells. The second town's church, Church of Saint Barbara,

5859-522: The municipal territory lies in the Mohelnice Depression lowland and the second half lies on the hillside of the Zábřeh Highlands . The highest point is at 537 m (1,762 ft) above sea level. The Moravská Sázava River flows through the south of the town. Oborník pond is located in the built-up area. The first written mention of Zábřeh is from 1254. It was most likely a settlement that

5952-420: The organic laboratory. Zinc is a bluish-white, lustrous, diamagnetic metal, though most common commercial grades of the metal have a dull finish. It is somewhat less dense than iron and has a hexagonal crystal structure , with a distorted form of hexagonal close packing , in which each atom has six nearest neighbors (at 265.9 pm) in its own plane and six others at a greater distance of 290.6 pm. The metal

6045-525: The passivating layer and the subsequent reaction with the acid releases hydrogen gas. The chemistry of zinc is dominated by the +2 oxidation state. When compounds in this oxidation state are formed, the outer shell s electrons are lost, yielding a bare zinc ion with the electronic configuration [Ar]3d . In aqueous solution an octahedral complex, [Zn(H 2 O) 6 ] is the predominant species. The volatilization of zinc in combination with zinc chloride at temperatures above 285 °C indicates

6138-406: The peroxide ( ZnO 2 ), the hydride ( ZnH 2 ), and the carbide ( ZnC 2 ) are also known. Of the four halides , ZnF 2 has the most ionic character, while the others ( ZnCl 2 , ZnBr 2 , and ZnI 2 ) have relatively low melting points and are considered to have more covalent character. In weak basic solutions containing Zn ions,

6231-400: The premises. Most non-embassy lands in such ownership are also not enclaves as they fall legally short of extraterritoriality , they are subject to alike court jurisdiction as before their grant/sale in most matters. Nonetheless, for a person's offence against the property itself, equally valid jurisdiction in criminal matters is more likely than elsewhere, assuming the perpetrator is found in

6324-568: The prosecuting authority's homeland. Devoid of permanent residents, formally defined new sovereignty is not warranted or asserted in the examples below. Nonetheless, minor laws, especially on flag flying , are sometimes relaxed to accommodate the needs of the accommodated nation's monument. Embassies enjoy many different legal statuses approaching quasi-sovereignty, depending on the agreements reached and in practice upheld from time-to-time by host nations. Subject to hosts adhering to basic due process of international law , including giving warnings,

6417-675: The region. Until 1918 Zábřeh was part of Austria-Hungary , head of the district with the same name, one of the 34 Bezirkshauptmannschaften in Moravia. In 1938, the town was annexed by Nazi Germany and administered as part of the Reichsgau Sudetenland . Most Jews were killed during the Holocaust . The German speaking population was expelled in 1945 according to the Beneš decrees . Abandoned houses were taken over by Czechs from different parts of

6510-399: The remainder, have been found that are 2,500 years old. A possibly prehistoric statuette containing 87.5% zinc was found in a Dacian archaeological site. Strabo writing in the 1st century BC (but quoting a now lost work of the 4th century BC historian Theopompus ) mentions "drops of false silver" which when mixed with copper make brass. This may refer to small quantities of zinc that is

6603-541: The reserve lifetime for zinc has remained unchanged. About 346 million tonnes have been extracted throughout history to 2002, and scholars have estimated that about 109–305 million tonnes are in use. Five stable isotopes of zinc occur in nature, with Zn being the most abundant isotope (49.17% natural abundance ). The other isotopes found in nature are Zn (27.73%), Zn (4.04%), Zn (18.45%), and Zn (0.61%). Several dozen radioisotopes have been characterized. Zn , which has

6696-497: The rest of the d-block metals. Many alloys contain zinc, including brass. Other metals long known to form binary alloys with zinc are aluminium , antimony , bismuth , gold , iron, lead , mercury, silver , tin , magnesium , cobalt , nickel , tellurium , and sodium . Although neither zinc nor zirconium is ferromagnetic , their alloy, ZrZn 2 , exhibits ferromagnetism below 35  K . Zinc makes up about 75  ppm  (0.0075%) of Earth's crust , making it

6789-529: The same crystal structure , and in other circumstances where ionic radius is a determining factor, the chemistry of zinc has much in common with that of magnesium. In other respects, there is little similarity with the late first-row transition metals. Zinc tends to form bonds with a greater degree of covalency and much more stable complexes with N - and S - donors. Complexes of zinc are mostly 4- or 6- coordinate , although 5-coordinate complexes are known. Zinc(I) compounds are very rare. The [Zn 2 ] ion

6882-458: The sea or another body of water, which comprises their own territorial waters (i.e., they are not surrounded by other nations' territorial waters). They border their own territorial waters in addition to a land border with another country, and hence they are not true exclaves. Still, one cannot travel to them on land without going through another country. Attribution of a pene-enclave status to a territory can sometimes be disputed, depending on whether

6975-581: The second known zinc-containing enzyme in 1955. Zinc is the fourth most common metal in use, trailing only iron , aluminium , and copper with an annual production of about 13 million tonnes. The world's largest zinc producer is Nyrstar , a merger of the Australian OZ Minerals and the Belgian Umicore . About 70% of the world's zinc originates from mining, while the remaining 30% comes from recycling secondary zinc. Commercially pure zinc

7068-511: The second millennium BC it was used in the regions currently including West India , Uzbekistan , Iran , Syria , Iraq, and Israel . Zinc metal was not produced on a large scale until the 12th century in India, though it was known to the ancient Romans and Greeks. The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. The oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as

7161-477: The territory is considered to be practically inaccessible from the mainland or not. One or more parcels/holdings of land in most countries is owned by other countries. Most instances are exempt from taxes. In the special case of embassies/consulates these enjoy special privileges driven by international consensus particularly the mutual wish to ensure free diplomatic missions , such as being exempt from major hindrances and host-country arrests in ordinary times on

7254-405: The territory of a single other state that surrounds it. In 2007, Evgeny Vinokurov called this the restrictive definition of "enclave" given by international law, which thus "comprises only so-called 'true enclaves'". Two examples are Büsingen am Hochrhein , a true enclave of Germany, and Campione d'Italia , a true enclave of Italy, both of which are surrounded by Switzerland. The definition of

7347-597: The territory of another country." Thus, a pene-exclave , although having land borders, is not completely surrounded by the other's land or territorial waters. Catudal (1974) and Vinokurov (2007) further elaborate upon examples, including Point Roberts . "Although physical connections by water with Point Roberts are entirely within the sovereignty of the United States, land access is only possible through Canada." Pene-enclaves are also called functional enclaves or practical enclaves. They can exhibit continuity of state territory across territorial waters but, nevertheless,

7440-515: The territory of only one other state or entity . An enclave can be an independent territory or part of a larger one. Enclaves may also exist within territorial waters . Enclave is sometimes used improperly to denote a territory that is only partly surrounded by another state. Enclaves that are not part of a larger territory are not exclaves, for example Vatican City and San Marino (both enclaved by Italy ) and Lesotho (enclaved by South Africa ) are enclaved sovereign states . An exclave

7533-644: The then-existing national-level enclaves were extinguished on 1 August 2015, when the governments of India and Bangladesh implemented a Land Boundary Agreement that exchanged 162 first-order enclaves (111 Indian and 51 Bangladeshi). This exchange thus effectively removed another two dozen second-order enclaves and one third-order enclave, eliminating 197 of the India–Bangladesh enclaves in all. The residents in these enclaves had complained of being effectively stateless. Only Bangladesh's Dahagram–Angarpota enclave remained. Netherlands and Belgium decided to keep

7626-520: The time of determination. Since exploration and mine development is an ongoing process, the amount of zinc reserves is not a fixed number and sustainability of zinc ore supplies cannot be judged by simply extrapolating the combined mine life of today's zinc mines. This concept is well supported by data from the United States Geological Survey (USGS), which illustrates that although refined zinc production increased 80% between 1990 and 2010,

7719-423: The two metal plates makes electrons flow from the zinc to the copper and corrode the zinc. The non-magnetic character of zinc and its lack of color in solution delayed discovery of its importance to biochemistry and nutrition. This changed in 1940 when carbonic anhydrase , an enzyme that scrubs carbon dioxide from blood, was shown to have zinc in its active site . The digestive enzyme carboxypeptidase became

7812-498: The use of impure zinc in ancient times have been discovered. Zinc ores were used to make the zinc–copper alloy brass thousands of years prior to the discovery of zinc as a separate element. Judean brass from the 14th to 10th centuries BC contains 23% zinc. Knowledge of how to produce brass spread to Ancient Greece by the 7th century BC, but few varieties were made. Ornaments made of alloys containing 80–90% zinc, with lead, iron, antimony , and other metals making up

7905-452: The word enclave was the Treaty of Madrid , signed in 1526. Later, the term enclave began to be used also to refer to parcels of countries, counties, fiefs, communes, towns, parishes, etc. that were surrounded by alien territory. This French word eventually entered English and other languages to denote the same concept, although local terms have continued to be used. In India, the word "pocket"

7998-446: Was acquired by the House of Liechtenstein , who owned it from 1622 until 1848. The Thirty Years' War affected Zábřeh mainly from the economic point of view, and the town never managed to return to its previous economic and cultural significance. The castle was partially baroque modified in 1661, then the northern Baroque wing was added in 1727–1736. After the abolition of the lordship system,

8091-408: Was built in 1772. The House Under The Arcades is one of the oldest houses in Zábřeh and one of the most valuable monuments. This Renaissance house from the 16th century was built on the site of two medieval houses, which were joined into one building. Today it houses the town museum. Zábřeh is twinned with: Enclave and exclave An enclave is a territory that is entirely surrounded by

8184-631: Was forced to sell the whole estate to Mikuláš Trčka of Lípa due to large debts. Trčka of Lípa traded the estate with the Boskovic family in 1512, In the 16th century, the significance of Zábřeh declined. The Zábřeh Castle was renaissance rebuilt in the 1560s and 1570. The estate was inherited by the Zierotin family in 1589. After the properties of the Zierotins were confiscated after the Battle of White Mountain , Zábřeh

8277-508: Was intended to protect the ford . A fortress was probably founded here together with the settlement. In 1278, Zábřeh was first referred to as a town. From the mid-14th century until 1392, the Zábřeh estate was held by the Moravian branch of the Sternberg family, then shortly by Jobst of Moravia , who donated it to lords of Kravaře in 1397. In the late 14th or early 15th century, the local fortress

8370-540: Was isolated in Europe, it was imported from India in about 1600 CE. Postlewayt 's Universal Dictionary , a contemporary source giving technological information in Europe, did not mention zinc before 1751 but the element was studied before then. Flemish metallurgist and alchemist P. M. de Respour reported that he had extracted metallic zinc from zinc oxide in 1668. By the start of the 18th century, Étienne François Geoffroy described how zinc oxide condenses as yellow crystals on bars of iron placed above zinc ore that

8463-574: Was rebuilt into a castle. In 1442, Jiří od Kravaře sold Zábřeh to the Tunkl of Brníčko family, who became the most significant owners of the town. It was the only aristocratic family that ever had its seat at Zábřeh Castle. They made Zábřeh the centre of one of the largest estates in Moravia . They had expanded and rebuilt the castle in the late Gothic style and established ponds here, of which only one has survived. They were also known for conflicts with neighbouring families and vassals. In 1508, Jindřich Tunkl

8556-421: Was reported with more evidence that had the oxidation state of +3 with the formula ZnBeB 11 (CN) 12 . Zinc chemistry is similar to the chemistry of the late first-row transition metals, nickel and copper, though it has a filled d-shell and compounds are diamagnetic and mostly colorless. The ionic radii of zinc and magnesium happen to be nearly identical. Because of this some of the equivalent salts have

8649-503: Was used through 1851. German chemist Andreas Marggraf normally gets credit for isolating pure metallic zinc in the West, even though Swedish chemist Anton von Swab had distilled zinc from calamine four years previously. In his 1746 experiment, Marggraf heated a mixture of calamine and charcoal in a closed vessel without copper to obtain a metal. This procedure became commercially practical by 1752. William Champion's brother, John, patented

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