|
Libethenite
Libethenite is a rare copper phosphate hydroxide mineral. It forms striking, dark green orthorhombic crystals. It was discovered in 1823 in Ľubietová, Slovakia and is named after the German name of that locality (''Libethen''). Libethenite has also been found in the Miguel Vacas Mine, Conceição, Vila Viçosa, Évora District, Portugal, and in Tier des Carrières, Cahai, Vielsaim, Stavelot Massif, Luxembourg Province, Belgium. Appearance Libethenite almost always takes the form of dark-green orthorhombic crystals. It is often found in clusters with other libethenite crystals. Formation Libethenite is found in the oxidized zone of copper ore deposits. It is most often formed from the weathering of phosphate rocks such as apatite, monazite, and xenotime Xenotime is a rare-earth phosphate mineral, the major component of which is yttrium orthophosphate ( Y P O4). It forms a solid solution series with chernovite-(Y) ( Y As O4) and therefore may contain trace impu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ľubietová
Ľubietová (german: Libethen) is a village in central Slovakia. Originally an ancient mining town, it is known for precious minerals. Geography Ľubietová is part of the Banská Bystrica District in the Banská Bystrica Region. It is situated 25 km east from the town of Banská Bystrica. It lies at an altitude of 491 metres and covers an area of 61 km². The geographic center of Slovakia, the Hrb mountain, is located near the village. History Thanks to abundant deposits of copper and less rich deposits of iron ore, Ľubietová became soon an important center of medieval mining industry. It was granted the status of a royal town in 1379 by Louis the Great and German miners settled here. As one of the most important centers of Protestant Reformation in the country, the town created the Protestant "League of Seven Mining Towns" together with Banská Belá, Banská Bystrica, Banská Štiavnica, Kremnica, Nová Baňa, and Pukanec. In 1692, the first modern blast furn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphate Minerals
Phosphate minerals contain the tetrahedrally coordinated phosphate (PO43−) anion along sometimes with arsenate (AsO43−) and vanadate (VO43−) substitutions, and 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 of the apatite group. It is the major resource mined to produce phosphate fertilizers for the agriculture sector. Phosphate is also used in animal feed supplements, food preservatives, anti-corrosion agents, cosmetics, fungicides, ceramics, water treatment and metallurgy. The largest use of minerals mined for their phosphate content is the production of fertilizer. Phosphate minerals are often used for control of rust and prevention of corrosion on ferrous materials applied with electrochemical conversion co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tier Des Carrières
Tier may refer to: Groupings *Organizational, a ranking relationship involving order in a collective and its subordinate components *Ranking, a relationship involving order between a set of observations or variables *Data center tiers, Telecommunications Infrastructure Standard for Data Centers, which defines a level in terms of "tiers" * Multitiered or multilayered, a tier based system in software architecture * Tier (emission standard), rankings of emission standards in the US * Standings or rankings are listings which compare sports teams or individuals, institutions, nations, companies, or other entities by ranking them in order of ability or achievement *Tier list, a list of playable characters ranked by their abilities in competitive settings *Tiers of suppliers in a supply chain In commerce, a supply chain is a network of facilities that procure raw materials, transform them into intermediate goods and then final products to customers through a distribution system. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper(II) Minerals
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form (native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create bronze, c. 350 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenotime
Xenotime is a rare-earth phosphate mineral, the major component of which is yttrium orthophosphate ( Y P O4). It forms a solid solution series with chernovite-(Y) ( Y As O4) and therefore may contain trace impurities of arsenic, as well as silicon dioxide and calcium. The rare-earth elements dysprosium, erbium, terbium and ytterbium, as well as metal elements such as thorium and uranium (all replacing yttrium) are the expressive secondary components of xenotime. Due to uranium and thorium impurities, some xenotime specimens may be weakly to strongly radioactive. Lithiophyllite, monazite and purpurite are sometimes grouped with xenotime in the informal "anhydrous phosphates" group. Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals (dysprosium, ytterbium, erbium and gadolinium). Occasionally, gemstones are also cut from the finest xenotime crystals. Etymology The name ''xenotime'' is from the Greek words κενός ''vain'' and τιμή ''honor'', ak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monazite
Monazite is a primarily reddish-brown phosphate mineral that contains rare-earth elements. Due to variability in composition, monazite is considered a group of minerals. The most common species of the group is monazite-(Ce), that is, the cerium-dominant member of the group. It occurs usually in small isolated crystals. It has a hardness of 5.0 to 5.5 on the Mohs scale of mineral hardness and is relatively dense, about 4.6 to 5.7 g/cm3. There are five different most common species of monazite, depending on the relative amounts of the rare earth elements in the mineral: * monazite-(Ce), ( Ce, La, Nd, Th) PO4 (the most common member), * monazite-(La), (La,Ce,Nd)PO4, * monazite-(Nd), (Nd,La,Ce)PO4, * monazite-(Sm), ( Sm, Gd,Ce,Th)PO4, * monazite-(Pr), ( Pr,Ce,Nd,Th)PO4. The elements in parentheses are listed in the order of their relative proportion within the mineral: lanthanum is the most common rare-earth element in monazite-(La), and so forth. Silica (SiO2) is present in trace a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apatite
Apatite is a group of phosphate minerals, usually hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ions, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca10( PO4)6(OH,F,Cl)2, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6F2 and Ca10(PO4)6Cl2. The mineral was named apatite by the German geologist Abraham Gottlob Werner in 1786, although the specific mineral he had described was reclassified as fluorapatite in 1860 by the German mineralogist Karl Friedrich August Rammelsberg. Apatite is often mistaken for other minerals. This tendency is reflected in the mineral's name, which is derived from the Greek word ἀπατάω (apatáō), which means ''to deceive''. Geology Apatite is very common as an accessory mineral in igneous and metamorphic rocks, where it is the most common phosphate mineral. However, occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxidized Zone
Gossan (eiserner hut or eisenhut) is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein. In the ''classic'' gossan or iron cap all that remains is iron oxides and quartz, often in the form of boxworks (which are quartz-lined cavities retaining the shape of the dissolved ore minerals). In other cases, quartz and iron oxides, limonite, goethite, and jarosite, exist as pseudomorphs, replacing the pyrite and primary ore minerals. Frequently, gossan appears as a red "stain" against the background rock and soil, due to the abundance of oxidized iron; the gossan may be a topographic positive area due to the abundance of erosion-resistant quartz and iron oxides. Although most gossans are red, orange, or yellow, black gossans from manganese oxides such as pyrolusite, manganite, and especially psilomelane form at the oxidized portion of manganese-rich mineral deposits. In the 19th and 20th centuries, gossans were important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgium
Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to the southwest, and the North Sea to the northwest. It covers an area of and has a population of more than 11.5 million, making it the 22nd most densely populated country in the world and the 6th most densely populated country in Europe, with a density of . Belgium is part of an area known as the Low Countries, historically a somewhat larger region than the Benelux group of states, as it also included parts of northern France. The capital and largest city is Brussels; other major cities are Antwerp, Ghent, Charleroi, Liège, Bruges, Namur, and Leuven. Belgium is a sovereign state and a federal constitutional monarchy with a parliamentary system. Its institutional organization is complex and is structured on both regional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luxembourg (Belgium)
Luxembourg (french: Luxembourg ; nl, Luxemburg ; german: Luxemburg ; lb, Lëtzebuerg ; wa, Lussimbork), also called Belgian Luxembourg, is the southernmost province of Wallonia and of Belgium. It borders on the country of Luxembourg to the east, the French departments of Ardennes, Meuse and Meurthe-et-Moselle to the south and southwest, and the Walloon provinces of Namur and Liège to the north. Its capital and largest city is Arlon, in the south-east of the province. It has an area of , making it the largest Belgian province. With around 285,000 residents, it is also the least populated province, with a density of , making it a relatively sparsely settled part of a very densely populated region, as well as the lowest density in Belgium. It is significantly larger (71%), but much less populous than the neighbouring Grand Duchy of Luxembourg. About eighty percent of the province is part of the densely wooded Ardennes region. The southernmost region of the province is cal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stavelot Massif
The Stavelot Massif is a geological massif in the Belgian Ardenne (geologically a part of the Rhenish Massif). Most of the massif crops out in Belgium, but a small part lies across the border with Germany. The massif consists of early Paleozoic (late Cambrian and Ordovician in age) metamorphic rocks, mostly quartzites and phyllites. In other parts of the Ardennes they form a basement which is covered by only slightly metamorphosed late Paleozoic limestones and sandstones, that only saw a low degree of metamorphism. On the other hand, the early Paleozoic rocks were deformed and metamorphosed to a higher degree during the Caledonian orogeny (about 450 million years ago). Both the Caledonian basement and the low grade cover rocks were deformed again during the Hercynian orogeny (about 350-280 million years ago). This phase of deformation created a large northeast-southwest oriented anticline that runs across the Belgian part of the Rhenish Massif (the Ardennes anticline). I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
