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Wurtzite Group
Wurtzite is a zinc and iron sulfide mineral with the chemical formula , a less frequently encountered structural polymorph form of sphalerite. The iron content is variable up to eight percent.Palache, Charles, Harry Berman & Clifford Frondel (1944), ''The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana,'' Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, pp. 226-228. It is trimorphous with matraite and sphalerite. It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite, barite and marcasite. It also occurs in low-temperature clay-ironstone concretions. It was first described in 1861 for an occurrence in the San José Mine, Oruro City, Cercado Province, Oruro Department, Bolivia, and named for French chemist Charles-Adolphe Wurtz. It has widespread distribution. In Europe it is reported from Příbram, Czech Republic; Hesse, Germany; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfide Mineral
The sulfide minerals are a class of minerals containing sulfide (S2−) or disulfide (S22−) as the major anion. Some sulfide minerals are economically important as metal ores. The sulfide class also includes the selenides, the tellurides, the arsenides, the antimonides, the bismuthinides, the sulfarsenides and the sulfosalts.http://www.minerals.net/mineral/sort-met.hod/group/sulfgrp.htm Minerals.net Dana Classification, SulfidesKlein, Cornelis and Cornelius S. Hurlbut, Jr., 1986, ''Manual of Mineralogy'', Wiley, 20th ed., pp 269-293 Sulfide minerals are inorganic compounds. Minerals Common or important examples include: * Acanthite *Chalcocite *Bornite * Galena * Sphalerite *Chalcopyrite *Pyrrhotite *Millerite *Pentlandite *Covellite *Cinnabar *Realgar *Orpiment *Stibnite *Pyrite *Marcasite *Molybdenite Sulfarsenides: *Cobaltite *Arsenopyrite *Gersdorffite Sulfosalts: *Pyrargyrite *Proustite *Tetrahedrite *Tennantite *Enargite *Bournonite * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oruro, Bolivia
Oruro (Hispanicized spelling) or Uru Uru is a city in Bolivia with a population of 264,683 (2012 calculation), about halfway between La Paz and Sucre in the Altiplano, approximately above sea level. It is Bolivia's fifth-largest city by population, after Santa Cruz de la Sierra, El Alto, La Paz, and Cochabamba. It is the capital of the Department of Oruro and the seat of the Roman Catholic Diocese of Oruro. Oruro has been subject to cycles of boom and bust owing to its dependence on the mining industry, notably tin, tungsten (wolfram), silver and copper. History The city was founded on November 1, 1606, by Don Manuel Castro de Padilla as a silver-mining center in the Urus region. At the time it was named Real Villa de San Felipe de Austria, after the Spanish monarch Philip III. It thrived for a while, but it was eventually abandoned as the silver mines became exhausted. Oruro was reestablished by European Bolivians in the late nineteenth century as a tin mining center. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Bow County, Montana
Silver Bow County is a county in the U.S. state Montana. As of the 2020 census, the population was 35,133. Its county seat is Butte. In 1977, the city and county governments consolidated to form the single entity of Butte-Silver Bow. Additionally, the town of Walkerville is a separate municipality from Butte and is within the county. Silver Bow County comprises the Butte-Silver Bow, MT Micropolitan Statistical Area. Geography According to the United States Census Bureau, the county has an area of , of which is land and (0.08%) is water. It is Montana's smallest county by area. Major highways * Interstate 15 * Interstate 90 * Interstate 115 * U.S. Highway 10 (Former) * U.S. Highway 91 * Montana Highway 2 * Montana Highway 41 * Montana Highway 43 * Montana Highway 55 Adjacent counties * Deer Lodge County - northwest * Jefferson County - east * Madison County - south * Beaverhead County - southwest National protected areas * Beaverhead National Forest (part) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Litchfield County, Connecticut
Litchfield County is in northwestern Connecticut. As of the 2020 census, the population was 185,186. The county was named after Lichfield, in England. Litchfield County has the lowest population density of any county in Connecticut and is the state's largest county by area. Litchfield County comprises the Torrington, CT Micropolitan Statistical Area, which is included in the New York–Newark, NY– NJ–CT– PA Combined Statistical Area. As is the case with the other seven Connecticut counties, there is no county government and no county seat. Each town is responsible for all local services such as schools, snow removal, sewers, and fire and police departments. However, in some cases in rural areas, adjoining towns may agree to jointly provide services or even establish a regional school system. History Litchfield County was created on October 9, 1751, by an act of the Connecticut General Court from land belonging to Fairfield, New Haven, and Hartford counties. The ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
England
England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain, which lies in the North Atlantic, and includes over 100 smaller islands, such as the Isles of Scilly and the Isle of Wight. The area now called England was first inhabited by modern humans during the Upper Paleolithic period, but takes its name from the Angles, a Germanic tribe deriving its name from the Anglia peninsula, who settled during the 5th and 6th centuries. England became a unified state in the 10th century and has had a significant cultural and legal impact on the wider world since the Age of Discovery, which began during the 15th century. The English language, the Anglican Church, and Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornwall
Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic Ocean, to the south by the English Channel, and to the east by the county of Devon, with the River Tamar forming the border between them. Cornwall forms the westernmost part of the South West Peninsula of the island of Great Britain. The southwesternmost point is Land's End and the southernmost Lizard Point. Cornwall has a population of and an area of . The county has been administered since 2009 by the unitary authority, Cornwall Council. The ceremonial county of Cornwall also includes the Isles of Scilly, which are administered separately. The administrative centre of Cornwall is Truro, its only city. Cornwall was formerly a Brythonic kingdom and subsequently a royal duchy. It is the cultural and ethnic origin of the Cornish dias ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liskeard
Liskeard ( ; kw, Lyskerrys) is a small ancient stannary and market town in south-east Cornwall, South West England. It is situated approximately 20 miles (32 km) west of Plymouth, west of the Devon border, and 12 miles (20 km) east of Bodmin. The Bodmin Moor lies to the north-west of the town. The total population of the town at the 2011 census was 11,366 History The Cornish place name element ''Lis'', along with ancient privileges accorded the town, indicates that the settlement was once a high status 'court'. King Dungarth whose cross is a few miles north near St Cleer is thought to be a descendant of the early 8th century king Gerren of Dumnonia and is said to have held his court in Liskeard (''Lis-Cerruyt''). Liskeard (Liscarret) was at the time of the Domesday Survey an important manor with a mill rendering 12d. yearly and a market rendering 4s. William the Conqueror gave it to Robert, Count of Mortain by whom it was held in demesne. Ever since that time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated between the Baltic and North seas to the north, and the Alps to the south; it covers an area of , with a population of almost 84 million within its 16 constituent states. Germany borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its financial centre is Frankfurt; the largest urban area is the Ruhr. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the bulk of the Holy Roman Empire. During the 16th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hesse
Hesse (, , ) or Hessia (, ; german: Hessen ), officially the State of Hessen (german: links=no, Land Hessen), is a States of Germany, state in Germany. Its capital city is Wiesbaden, and the largest urban area is Frankfurt. Two other major historic cities are Darmstadt and Kassel. With an area of 21,114.73 square kilometers and a population of just over six million, it ranks seventh and fifth, respectively, among the sixteen German states. Frankfurt Rhine-Main, Germany's second-largest metropolitan area (after Rhine-Ruhr), is mainly located in Hesse. As a cultural region, Hesse also includes the area known as Rhenish Hesse (Rheinhessen) in the neighbouring state of Rhineland-Palatinate. Name The German name '':wikt:Hessen#German, Hessen'', like the names of other German regions (''Schwaben'' "Swabia", ''Franken'' "Franconia", ''Bayern'' "Bavaria", ''Sachsen'' "Saxony"), derives from the dative plural form of the name of the inhabitants or German tribes, eponymous tribe, the Hes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Czech Republic
The Czech Republic, or simply Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The Czech Republic has a hilly landscape that covers an area of with a mostly temperate continental and oceanic climate. The capital and largest city is Prague; other major cities and urban areas include Brno, Ostrava, Plzeň and Liberec. The Duchy of Bohemia was founded in the late 9th century under Great Moravia. It was formally recognized as an Imperial State of the Holy Roman Empire in 1002 and became a kingdom in 1198. Following the Battle of Mohács in 1526, the whole Crown of Bohemia was gradually integrated into the Habsburg monarchy. The Protestant Bohemian Revolt led to the Thirty Years' War. After the Battle of White Mountain, the Habsburgs consolidated their rule. With the dissolution of the Holy Empire in 1806, the Cro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Příbram
Příbram (; german: Freiberg in Böhmen, ''Przibram'', or ''Pribram'', in 1939–1945 ''Pibrans'') is a town in the Central Bohemian Region of the Czech Republic. It has about 32,000 inhabitants. It is well known for its mining history, and more recently, its new venture into economic restructuring. The town is the third-largest in the Central Bohemian Region (behind Kladno and Mladá Boleslav), and is a natural administrative and cultural centre of the south-western part of the region, although it also tends to be largely influenced by the proximity of Prague. The Svatá Hora pilgrimage site above the town is the oldest and most important Marian pilgrimage site in Bohemia. Příbram is also known for the Mining Museum Příbram. Administrative parts Příbram is made up of 18 town parts and villages: *Příbram I *Příbram II *Příbram III *Příbram IV *Příbram V-Zdaboř * Příbram VI-Březové Hory *Příbram VII *Příbram VIII *Příbram IX *Brod *Bytíz *Jerusalem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles-Adolphe Wurtz
Charles Adolphe Wurtz (; 26 November 181710 May 1884) was an Alsatian French chemist. He is best remembered for his decades-long advocacy for the atomic theory and for ideas about the structures of chemical compounds, against the skeptical opinions of chemists such as Marcellin Berthelot and Henri Étienne Sainte-Claire Deville. He is well known by organic chemists for the Wurtz reaction, to form carbon-carbon bonds by reacting alkyl halides with sodium, and for his discoveries of ethylamine, ethylene glycol, and the aldol reaction. Wurtz was also an influential writer and educator. Life Adolphe Wurtz (he never used the name "Charles") was born in Strasbourg, where his father, Johann Jacob (Jean Jacques) Wurtz, was a Lutheran pastor in the nearby town of Wolfisheim. His wife, Adolphe's mother, Sophie Kreiss, died in 1878. When he left the Protestant gymnasium at Strasbourg in 1834, his father allowed him to study medicine as next best to theology. He devoted himself specially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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