Chemistry

Akimotoite: Occurrence and Identification

Akimotoite: Occurrence and Identification

Akimotoite is a rare silicate mineral (Mg,Fe)SiO3 in the ilmenite group of minerals. It found in fragments within veins of the shock-induced melt. It is a member of the Ilmenite group and dimorphic relationship with enstatite and clinoenstatite. It is polymorphous with pyroxene and with bridgmani.....

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Akhtenskite

Akhtenskite

Akhtenskite is a manganese oxide mineral with the chemical formula of MnO2 that was named after the Akhtensk deposit in Russia, where it was first discovered and noted in 1979. It is a rare grey or black mineral containing manganese and oxygen. It was named after its discovery locality in Russia......

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Akermanite

Akermanite

Akermanite, formula – (Ca2Mg[Si2O7]) is a melilite mineral of the sorosilicate group, containing calcium, magnesium, silicon, and oxygen. It is consists of calcium magnesium silicate and is an end-member of the melilite series It is a product of contact metamorphism of siliceous limestones .....

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Akdalaite: Properties

Akdalaite: Properties

Akdalaite is a very rare mineral found in Kazakhstan and has the formula 5Al2O3·H2O. It was formerly believed to be 5Al2O3·H2O It is, therefore, the same as tohdite an artificially produced phase. Studies on the crystal structure and spectra indicate that this is an aluminum oxide hydroxide. Ak.....

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Akatoreite: Properties and Occurrence

Akatoreite: Properties and Occurrence

Akatoreite {(Mn2+, Fe2+)9 Al2 [(OH)3|His4O13]} is a mineral found in New Zealand. It was named after the place it was initially discovered – Akatore Creek, New Zealand. Physical Properties Cleavage: {010} Perfect, {021} Good Color: Orange, Brown. Density: 3.48 Diaphaneity: Transparent Habit.....

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Akaganeite: Properties and Occurrence

Akaganeite: Properties and Occurrence

Akaganeite is an iron(III) oxide-hydroxide / chloride mineral with formula: Fe3+O(OH,Cl). It is a chlorine mineral/iron (III) oxide-hydroxide that is formed by the weathering pyrrhotite. Nickel also has been reported in the structure. It has a monoclinic crystal structure, a metallic luster, and .....

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Ajoite: Occurrence and Properties

Ajoite: Occurrence and Properties

Ajoite is a hydrated sodium potassium copper aluminum silicate hydroxide mineral. Ajoite has the chemical formula (Na,K)Cu7AlSi9O24(OH)6.3H2O and minor Mn, Fe and Ca are usually also present in the structure. Ajoite is used as a minor ore of copper. General information Category: Silicate mineral .....

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Aikinite: Identification and Occurrence

Aikinite: Identification and Occurrence

Aikinite is a sulfide mineral of lead, copper, and bismuth with formula PbCuBiS3. It forms black to grey or reddish brown acicular orthorhombic crystals with a Mohs hardness of 2 to 2.5 and a specific gravity of 6.1 to 6.8. It was originally found in 1843 in the Beryozovskoye deposit, Ural Mounta.....

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Ahlfeldite

Ahlfeldite

Ahlfeldite, formula ((Ni,Co)[SeO3]·2H2O) is a mineral of secondary origin. It’s named after Friedrich Ahlfeld (1892–1982), a German-Bolivian mining engineer and geologist. Its type locality is Virgen de Surumi mine, Pakajake Canyon, Chayanta Province, Potosí Department, Bolivia. General.....

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Aheylite: Identification and Properties

Aheylite: Identification and Properties

Aheylite is a rare phosphate mineral with formula (Fe2+Zn)Al6[(OH)4|(PO4)2]2·4(H2O). It was named after Allen V. Heyl, an economic geologist associated with the U.S. Geological Survey. It is a part of the turquoise group. It occurs as pale blue to pale green triclinic crystal masses. It was made.....

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Aguilarite: Identification and Occurrence

Aguilarite: Identification and Occurrence

Aguilarite is an uncommon sulfosalt mineral with formula Ag4SeS. It was described in 1891 and was named after Ponciano Aguilar, the former superintendent of the San Carlos Mine, Guanajuato, Mexico, where the material was originally located. Aguilarite is bright lead-gray on fresh surfaces but bec.....

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Agrinierite: Physical and Chemical Properties

Agrinierite: Physical and Chemical Properties

Agrinierite, formula- [K2(Ca,Sr)(UO2)3O3(OH)2].5H2O is a mineral often found in the oxidation zone of uranium deposits. It was named for the engineer of the Mineralogy Laboratory of the French Atomic Energy Commission in Paris, Henri Agrinier. It is a rare mineral that can be found only at the Ma.....

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