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Stibiconite Group
Stibiconite, also formerly known as ''stiblite''''Robert Philips Greg, William Garrow Lettsom'' (1858). Manual of the Mineralogy of Great Britain & Ireland. — London: John Van Voorst, 1858. or ''antimony ochre''Bulletin of the United States National Museum. Published under the Direction of the Smithsonian Institution. Washington: Government Printing Office, No.32, 1887. is an antimony oxide mineral with formula: Sb3O6(OH). Its name originates from Greek (), 'antimony' and (), 'powder', alluding to its composition and habit. It is a member of the pyrochlore super group. Discovery and occurrence It was first described in 1862 for an occurrence in the Brandholz – Goldkronach District, Fichtel Mountains, Bavaria, Germany. It occurs as a secondary alteration product of other hydrothermal antimony minerals such as stibnite. It occurs in association with cervantite, valentinite, kermesite, native antimony Native antimony is a mineral belonging to the group of native elements, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxide Minerals
The oxide mineral class includes those minerals in which the oxide anion (O2−) is bonded to one or more metal alloys. The hydroxide-bearing minerals are typically included in the oxide class. Minerals with complex anion groups such as the Silicate mineral, silicates, Sulfate mineral, sulfates, carbonate mineral, carbonates and Phosphate mineral, phosphates are classed separately. Simple oxides *XO form **Periclase group ***Periclase ***Manganosite **Zincite group ***Zincite ***Bromellite ***Tenorite ***Litharge * form **Cuprite **Ice * form **Hematite group ***Corundum ***Hematite ***Ilmenite * form **Rutile group ***Rutile ***Pyrolusite ***Cassiterite **Baddeleyite **Uraninite **Thorianite * form **Spinel group ***Spinel ***Gahnite ***Magnetite ***Franklinite ***Chromite **Chrysoberyl **Columbite *Hydroxide subgroup: **Brucite **Manganite **Romanèchite **Goethite group: ***Diaspore ***Goethite Nickel–Strunz class 4: oxides Internationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fichtel Mountains
The Fichtel Mountains (, ; ) is a mountain range in Germany and the Czech Republic. They extend from the valley of the Red Main River in northeastern Bavaria to the Karlovy Vary Region in western Czech Republic. The Fichtel Mountains contain an important nature park, the Fichtel Mountain Nature Park. The Elster Mountains are a part of the Fichtel Mountains. Etymology The first person to write about the Fichtel Mountains, Matthias of Kemnath (actually Matthias Widmann, born 23 February 1429 in Kemnath) reported in 1476: ''Ein bergk, hoch, weitt, wolbekant ligt in Beiern, gnant der Fichtelberg'' ("A mountain, high, wide and well-known, lies in Bavaria, known as the Fichtelberg"). In descriptions of the border in 1499 and 1536, the mountain that is now called the Ochsenkopf (Fichtel Mountains), Ochsenkopf was called ''Vichtelberg''; thereafter the name was extended to the whole mountain region. It is also mentioned in old documents: around 1317 the lords of Hirschberg were enfeof ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cubic Minerals
Cubic may refer to: Science and mathematics * Cube (algebra) In arithmetic and algebra, the cube of a number is its third exponentiation, power, that is, the result of multiplying three instances of together. The cube of a number is denoted , using a superscript 3, for example . The cube Mathematical ..., "cubic" measurement * Cube, a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex ** Cubic crystal system, a crystal system where the unit cell is in the shape of a cube * Cubic function, a polynomial function of degree three * Cubic equation, a polynomial equation (reducible to ''ax''3 + ''bx''2 + ''cx'' + ''d'' = 0) * Cubic form, a homogeneous polynomial of degree 3 * Cubic graph (mathematics - graph theory), a graph where all vertices have degree 3 * Cubic plane curve (mathematics), a plane algebraic curve ''C'' defined by a cubic equation * Cubic reciprocity (mathematics - number theory), a theorem ana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antimony Minerals
Antimony is a chemical element; it has symbol Sb () and atomic number 51. A lustrous grey metal or metalloid, it is found in nature mainly as the sulfide mineral stibnite (). Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name kohl. The earliest known description of this metalloid in the West was written in 1540 by Vannoccio Biringuccio. China is the largest producer of antimony and its compounds, with most production coming from the Xikuangshan Mine in Hunan. The industrial methods for refining antimony from stibnite are roasting followed by reduction with carbon, or direct reduction of stibnite with iron. The most common applications for metallic antimony are in alloys with lead and tin, which have improved properties for solders, bullets, and plain bearings. It improves the rigidity of lead-alloy plates in lead–acid batteries. Antimony trioxide is a prominent additive for haloge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Antimony
Native antimony is a mineral belonging to the group of native elements, with properties equivalent to those of the antimony element obtained by processing its ores. The name comes from the Latin ''antimonium''. For centuries, the term ''antimony'' was also used to refer to stibnite or antimonite, the most common mineral containing this element, from which it was typically extracted. In mineralogy, the official name is simply antimony, although, as with other native elements, it is often referred to as native antimony to avoid ambiguity. It is unclear where native antimony was first discovered, although the Sala silver mine in Västmanland, Sweden, is considered the type locality. Properties The fundamental component is antimony itself, and it is usually very pure, although it may contain traces of other elements, especially arsenic, bismuth, iron, or silver. It is part of the native arsenic group, which also includes arsenolamprite (a polymorph of native arsenic), native bismu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kermesite
Kermesite or antimony oxysulfide is also known as red antimony or ''purpur blende'' (Sb2S2O) . The mineral's color ranges from cherry red to a dark red to a black. Kermesite is the result of partial oxidation between stibnite (Sb2S3) and other antimony oxides such as valentinite (Sb2O3) or stibiconite (Sb3O6(OH)). Under certain conditions with oxygenated fluids the transformation of all sulfur to oxygen would occur but kermesite occurs when that transformation is halted. Mining and specimens Deposits of this mineral have been found all over the world, however notable deposits have been found in Braunsdorf, near Freiberg, Saxony, Germany; Pernek, Pezinok, and Pribram, Czechoslovakia; the Lac Nicolet mine, South Ham Township, Wolfe County, Quebec, Canada; Sombrerete, Zacatecas, Mexico; Santa Cruz and San Francisco mines, Poopo, Oruro, Bolivia; Que Que, Zimbabwe; Djebel Haminate, Algeria; Broken Hill, New South Wales, Australia; Mohave, Kern County, California and Burke, Shoshon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valentinite
Valentinite is an Antimony trioxide, antimony oxide mineral with formula antimony, Sb2oxygen, O3. Valentinite crystallizes in the orthorhombic system and typically forms as radiating clusters of euhedral crystals or as fibrous masses. It is colorless to white with occasional shades or tints of yellow and red. It has a Mohs hardness of 2.5 to 3 and a specific gravity of 5.76.Pradyot Patnaik. ''Handbook of Inorganic Chemicals''. McGraw-Hill, 2002, Valentinite occurs as a weathering product of stibnite and other antimony minerals. It is dimorphous with the Cubic (crystal system), isometric antimony oxide senarmontite. Historical data Valentinite is a mineral named in the middle of the 19th century in honour of Basilius Valentinus, a writer on alchemy. He is the supposed author of the first book to give a detailed description of antimony and its compounds. From the contents of the book it is also obvious that Valentinus was familiar with the synthetic preparation of antimony trioxide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cervantite
Cervantite, also formerly known as '' antimony ochre'''' James Dwight Dana A. M., Brush G. J.'' A system of mineralogy : Descriptive mineralogy, comprising the most recent discoveries. — New York : J. Wiley & Sons, 1884. — is an antimony oxide mineral with formula Sb3+Sb5+O4 ( antimony tetroxide). It was first described in 1850 for an occurrence in Cervantes, Galicia, Spain, and named for the locality. The mineral was questioned and disapproved, but re-approved and verified in 1962 based on material from the Zajaca-Stolice district, Brasina, Serbia. It occurs as a secondary alteration product of antimony bearing minerals, mainly stibnite Stibnite, sometimes called antimonite, is a sulfide mineral, a mineral form of antimony trisulfide ( Sb2 S3). It is a soft, metallic grey crystalline solid with an orthorhombic space group. It is the most important source for the metalloid an .... References Antimony minerals Oxide minerals Orthorhombic minerals Minerals in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stibnite
Stibnite, sometimes called antimonite, is a sulfide mineral, a mineral form of antimony trisulfide ( Sb2 S3). It is a soft, metallic grey crystalline solid with an orthorhombic space group. It is the most important source for the metalloid antimony. The name is derived from the Greek through the Latin as the former name for the mineral and the element antimony. Structure Stibnite has a structure similar to that of arsenic trisulfide, As2S3. The Sb(III) centers, which are pyramidal and three-coordinate, are linked via bent two-coordinate sulfide ions. However, some studies suggest that the actual coordination polyhedra of antimony are SbS7, with (3+4) coordination at the M1 site and (5+2) at the M2 site. Some of the secondary bonds impart cohesion and are connected with packing. Stibnite is grey when fresh, but can turn superficially black due to oxidation in air. Properties The melting point of Sb2S3 is . The band gap is 1.88 eV at room temperature and it is a pho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bavaria
Bavaria, officially the Free State of Bavaria, is a States of Germany, state in the southeast of Germany. With an area of , it is the list of German states by area, largest German state by land area, comprising approximately 1/5 of the total land area of Germany, and with over 13.08 million inhabitants, it is the list of German states by population, second most populous German state, behind only North Rhine-Westphalia; however, due to its large land area, its population density is list of German states by population density, below the German average. Major cities include Munich (its capital and List of cities in Bavaria by population, largest city, which is also the list of cities in Germany by population, third largest city in Germany), Nuremberg, and Augsburg. The history of Bavaria includes its earliest settlement by Iron Age Celts, Celtic tribes, followed by the conquests of the Roman Empire in the 1st century BC, when the territory was incorporated into the provinces of Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrochlore
Pyrochlore () is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure ''F''dm. The name is from the Greek , ''fire'', and , ''green'' because it typically turns green on ignition in classic blowpipe analysis. Mineral The general formula, (where A and B are metals), represent a family of phases isostructural to the mineral pyrochlore. Pyrochlores are an important class of materials in diverse technological applications such as luminescence, ionic conductivity, nuclear waste immobilization, high-temperature thermal barrier coatings, automobile exhaust gas control, catalysts, solid oxide fuel cell, ionic/electrical conductors etc. The mineral is associated with the metasomatic end stages of magmatic intrusions. Pyrochlore crystals are usually well-formed (euhedral), occurring usually as octahedra of a yellowish or brownish color and resinous luster. It is commonly metamict due to radiation damage from includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catorce
Catorce is a municipality in the Mexican state of San Luis Potosí in central Mexico. The municipal seat is the '' pueblo mágico'' of Real de Catorce Real de Catorce (; meaning: '' Real unit of currencyof Fourteen''), often shortened to Real, is a village in the Mexican state of San Luis Potosí and the seat of the municipality of Catorce. It is located north of the city of San Luis Potosí .... References {{coord, 23, 41, N, 100, 53, W, region:MX_source:kolossus-ruwiki, display=title Municipalities of San Luis Potosí ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
