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Pyromorphite
Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5( P O4)3 Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. Crystals are common, and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Crystals with a barrel-like curvature are not uncommon. Globular and reniform masses are also found. Pyromorphite is part of the apatite group of minerals and bears a close resemblance physically and chemically with two other minerals: mimetite (Pb5( AsO4)3Cl) and vanadinite (Pb5( VO4)3Cl). The resemblance in external characters is so close that, as a rule, it is only possible to distinguish between them by chemical tests. They were formerly confused under the names green lead ore and brown lead ore (''German: Grünbleierz and Braunbleierz''). History The mineral was first distinguished chemically by M. H. Klaproth in 1784, and it was named pyromorphite by J. F. L. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphate Mineral
Phosphate minerals are minerals that contain the tetrahedrally coordinated phosphate () anion, sometimes with arsenate () and vanadate () substitutions, along with chloride (Cl−), fluoride (F−), and hydroxide (OH−) anions, that also fit into the crystal structure. The phosphate class of minerals is a large and diverse group, however, only a few species are relatively common. Applications Phosphate rock has high concentration of phosphate minerals, most commonly from the apatite group of minerals. It is the major resource mined to produce phosphate fertilizers for the agricultural industry. Phosphate is also used in animal feed supplements, food preservatives, anti-corrosion agents, cosmetics, fungicides, ceramics, water treatment and metallurgy. The production of fertilizer is the largest source responsible for minerals mined for their phosphate content. Phosphate minerals are often used to control rust, and to prevent corrosion on ferrous materials applied with ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mimetite
Mimetite is a lead arsenate chloride mineral () which forms as a secondary mineral in lead deposits, usually by the Redox, oxidation of galena and arsenopyrite. The name derives from the Greek ''mimetes'', meaning "imitator" and refers to mimetite's resemblance to the mineral pyromorphite. This resemblance is not coincidental, as mimetite forms a mineral series with pyromorphite () and with vanadinite (). Notable occurrences are Mapimi, Durango, Mexico, and Tsumeb, Namibia. Properties Mimetite typically forms short hexagonal crystals that are yellow to brown to orange in color, very brittle, moderately hard (Mohs hardness 3.5–4), and dense (specific gravity 7.24). It is distinctive for its lack of transparency, its resinous to adamantine Luster (mineralogy), luster, and its solubility in nitric acid. Mimetite forms a complete solid solution series with pyromorphite, with phosphate () substituting for arsenate (). The two minerals are almost identical in their properties and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Friedrich Ludwig Hausmann
Johann Friedrich Ludwig Hausmann (22 February 1782 – 26 December 1859) was a German mineralogist. Biography He was born in Hannover and educated in Göttingen, where he obtained a PhD. Two years after making a geological tour of Denmark, Norway and Sweden in 1807, he was placed at the head of a government mining establishment in Westphalia, and established a school of mines at Clausthal in the Harz mountains. In 1811 he was appointed professor of technology and mining, and later of geology and mineralogy at the university of Göttingen, which he occupied until shortly before his death. Additionally, he was secretary of the Royal Academy of Sciences in Göttingen for many years. In 1813, he was elected a foreign member of the Royal Swedish Academy of Sciences. He published observations on the geology and mineralogy of Spain and Italy as well as that of central and northern Europe: he wrote on gypsum, pyrites, felspar, tachylite, cordierite and some eruptive rocks, and devot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zschopau
Zschopau (), is a town in the Erzgebirgskreis district of Saxony, Germany. The town grew around the castle, which was built in the mid-12th century to protect the Salt Road, which crossed the Zschopau River here. Mining was also practiced from the 14th century onward, and in 1493, Zschopau was granted the privileges of a " Freie Bergstadt" However, its importance always lagged behind the major mining towns in the Ore Mountains. The development of crafts and trades was favored by the trade route; in 1451, Zschopau was granted market rights and in 1466, brewing rights. The first guilds of weavers and calico printers were founded as early as 1529. Later, textile factories and spinning mills developed, which favored Zschopau's early transformation into an industrial city at the beginning of the 19th century. Motorcycles have been built in Zschopau since 1922. The world's first motorcycle assembly line was located here in 1926, and the ''Zschopauer Motorenwerke'', with its DKW bran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cherokee County, Georgia
Cherokee County is in the US state of Georgia (U.S. state), Georgia. As of the 2020 census the population was 266,620.US 2020 Census Bureau report, Cherokee County, Georgia The county seat is Canton, Georgia, Canton. The county County commission, Board of Commissioners is the governing body, with members elected to office. Cherokee County is included to be part of Metro Atlanta. History Original territory Cherokee County was created by an act of the Georgia General Assembly on December 26, 1831, covering a vast area northwest of the Chattahoochee River and Chestatee River (except for Carroll County, Georgia, Carroll County). It was named after the Cherokee, Cherokee people who lived in the area at that time. The discovery of gold in local streams accelerated the push of European Americans to expel the Cherokee from their land. In 1832, the State of Georgia implemented the Georgia Land Lotteries, Cherokee Land Lottery, which gave deeds of land that had previously belonged to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlantic, North Atlantic, the French West Indies, and List of islands of France, many islands in Oceania and the Indian Ocean, giving it Exclusive economic zone of France, one of the largest discontiguous exclusive economic zones in the world. Metropolitan France shares borders with Belgium and Luxembourg to the north; Germany to the northeast; Switzerland to the east; Italy and Monaco to the southeast; Andorra and Spain to the south; and a maritime border with the United Kingdom to the northwest. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea. Its Regions of France, eighteen integral regions—five of which are overseas—span a combined area of and hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhône (département)
The Rhône ( , ; Occitan: ''Ròse''; Arpitan: ''Rôno'') is a major river in France and Switzerland, rising in the Alps and flowing west and south through Lake Geneva and Southeastern France before discharging into the Mediterranean Sea ( Gulf of Lion). At Arles, near its mouth, the river divides into the Great Rhône () and the Little Rhône (). The resulting delta forms the Camargue region. The river's source is the Rhône Glacier, at the east edge of the Swiss canton of Valais. The glacier is part of the Saint-Gotthard Massif, which gives rise to three other major rivers: the Reuss (river), Reuss, Rhine and Ticino (river), Ticino. The Rhône is, with the Po (river), Po and the Nile, one of the three Mediterranean rivers with the largest Discharge (hydrology), water discharge. Etymology The name ''Rhône'' continues the Latin name (Ancient Greek, Greek ) in Greco-Roman geography. The Gaulish name of the river was or (from a Proto-Indo-European language, PIE root *''r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaujeu, Rhône
Beaujeu () is a commune of the Rhône department in eastern France. It lies southwest of Mâcon and northwest of Lyon, on the river Ardière. Beaujeu gives its name to the famous wine region Beaujolais and the former province Beaujolais (''Biôjolês''), of which it is the historical capital. However it was overtaken in the 14th century by Villefranche-sur-Saône, which remains the main commercial centre of the region. History Beaujolais was a semi-autonomous fiefdom of the Lords of Beaujeu. The barony was acquired in the 9th century by Guillaume, Comte du Lyonnais and Count of Forez; on his death, his son Bérard became the first Lord of Beaujeu. List of rulers Lords: * Berard of Beaujeu + c. 966 * Guichard I of Beaujeu c. 966-977 * Humbert I of Beaujeu + c. 977-1016 * Guichard II of Beaujeu c. 1016-1050 * Guichard III of Beaujeu c. 1050-1070 * Humbert II of Beaujeu c. 1070-1102 * Guichard IV of Beaujeu 1102-1137 * Humbert III of Beaujeu 1137-1174 * Humbert IV of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chénelette
Chénelette () is a commune in the Rhône department in eastern France. While there have been settlements in the region since before the Roman conquest of Gaul, the modern village of Chénelette first appears in records dating to the 14th century. Today it has a population of approximately 300 people. Geography Chénelette is a small village of approximately 300 people (2012) located in the north-west of the Rhône Department, notably in the Beaujolais region. The surrounding landscape is one of forests, mountains (of the Massif Central), and pastures; and is frequented by hikers and outdoor enthusiasts. The village has an elevation of 660 meters, and is located approximately 60 kilometres north-northwest of Lyon (as the crow flies) and about 375 kilometres south-south west of Paris (as the crow flies). It lies between Roanne and Mâcon. History Chénelette has its roots from the Middle Ages when, in the fourteenth century, a castle was built at the peak of the Mont Tourvé ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bohemia
Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historically it could also refer to a wider area consisting of the Lands of the Bohemian Crown ruled by the List of Bohemian monarchs, Bohemian kings, including Moravia and Czech Silesia, in which case the smaller region is referred to as Bohemia Proper as a means of distinction. Bohemia became a part of Great Moravia, and then an independent principality, which became a Kingdom of Bohemia, kingdom in the Holy Roman Empire. This subsequently became a part of the Habsburg monarchy and the Austrian Empire. After World War I and the establishment of an History of Czechoslovakia (1918–1938), independent Czechoslovak state, the whole of Bohemia became a part of Czechoslovakia, defying claims of the German-speaking inhabitants that regions with German ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stříbro
Stříbro (; ) is a town in Tachov District in the Plzeň Region of the Czech Republic. It has about 8,100 inhabitants. The historic town centre with the Renaissance Stříbro bridge is well preserved and is protected as an Cultural monument (Czech Republic)#Monument zones, urban monument zone. Administrative division Stříbro consists of seven municipal parts (in brackets population according to the 2021 census): *Stříbro (7,134) *Butov (13) *Jezerce (30) *Lhota u Stříbra (89) *Milíkov (80) *Otročín (37) *Těchlovice (136) Etymology The Czech name derives from 'silver' (), which used to be mined there. The German name ''Mies'' comes from the name of the Mže river. Geography Stříbro is located about east of Tachov and west of Plzeň. It lies in the Plasy Uplands. The highest point is the hill Jirná at above sea level. The Mže River flows through the town. The confluence of the Mže and Úhlavka rivers is located on the southern outskirts of the town. A part of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
