Geographic Minerals

Mohrite: Properties and Occurrences

Mohrite: Properties and Occurrences

Minerals form in all geologic environments and thus under a wide range of chemical and physical conditions, such as varying temperatures and pressure.  Mohrite, (NH4)2 Fe(SO4)2·6(H2O), is a rare sulfate mineral originally found in the geothermal fields of Tuscany, Italy.  It is a monoclinic-pr.....

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Mohite: Properties and Occurrences

Mohite: Properties and Occurrences

Mohite is a copper-tin sulfide mineral with the chemical formula Cu2SnS3. It is a triclinic-pedial greenish-gray mineral containing copper, sulfur, and tin. It is of hydrothermal origin and occurs associated with tetrahedrite, famatinite, kuramite, mawsonite, and emplectite in the type locality i.....

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Moganite: Properties and Occurrences

Moganite: Properties and Occurrences

Moganite is an oxide mineral with the chemical formula SiO2 (silicon dioxide) that was discovered in 1984. It is a crystalline form of silica that has a different crystal structure than that of quartz. It crystallizes in the monoclinic crystal system. Moganite is considered a polymorph of quartz:.....

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Mixite: properties and Occurrences

Mixite: properties and Occurrences

Mixite is one of just a handful of bismuth minerals and one of the even fewer bismuth arsenates. It is a rare copper bismuth arsenate mineral with formula: BiCu6(AsO4)3(OH)6·3(H2O). It is a mineral, consisting of green to whitish hydrous basic copper bismuth arsenate. It is a hexagonal hydrated .....

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Mirabilite: Properties and Occurrences

Mirabilite: Properties and Occurrences

Mirabilite is a widespread sulfate mineral, hydrated sodium sulfate that forms efflorescences and crusts, particularly in arid regions. It also is known as Glauber’s salt, is a hydrous sodium sulfate mineral with the chemical formula Na2SO4·10H2O. It is a mineral consisting of hydrous sodi.....

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Minyulite: Properties and Occurrences

Minyulite: Properties and Occurrences

Minyulite is a rare phosphate mineral with a chemical formula of KAl2(OH, F)(PO4)2·4(H2O). It is a mineral consisting of a hydrous basic phosphate of potassium and aluminum found in Australia. It occurs as groups of radiating fine fibrous crystals within rock cracks of phosphatic ironstone. It w.....

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Minnesotaite: Properties and Occurrence

Minnesotaite: Properties and Occurrence

Minnesotaite is an iron silicate mineral with formula: (Fe2+, Mg)3Si4O10(OH)2. It is a silicate of iron and magnesium, crystallizing in the triclinic system and occurring as dull or waxy greenish-grey plates or needles. It is a hydrous silicate of iron, probably isomorphous with talc. It is an ir.....

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Minium: Properties and Occurrences

Minium: Properties and Occurrences

Minium is the naturally occurring form of lead tetroxide, Pb2+2Pb4+O4 also known as red lead. It is red lead oxide, sometimes found as a mineral but usually prepared synthetically; tri-lead tetroxide. It is a reddish oxide of lead, used as a pigment in paints and in glass and ceramics Minium is r.....

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Jarosite (Mineral)

Jarosite (Mineral)

Jarosite is both an individual mineral and a collective name for many minerals that are related. It is a potassium and iron simple hydrous sulfate with a chemical formula of KFe3+3(OH)6(SO4)2. Jarosite is the group’s most frequent member; Ammoniojarosite, Argentojarosite, Beaverite, Dorallc.....

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Mimetite: Properties and Occurrences

Mimetite: Properties and Occurrences

Mimetite is a lead arsenate and chloride isomorphous with pyromorphite. It is a yellow or brown mineral consisting of a chloride and arsenate of lead, typically found as a crust or needle-like crystals in lead deposits. Its color ranges from brown to olive green, yellow, or orange. Its name deriv.....

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Kaolinite

Kaolinite

Kaolinite (/ˈkeɪəlɪnaɪt/), a group of natural clay minerals comprising the main ingredients of kaolin (china clay), which are hydrous aluminum silicates. It is part of the Al2Si2O5(OH)4 chemical composition group of industrial minerals. It is easily broken and, especially when wet, can be mo.....

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Millerite: Properties and Occurrences

Millerite: Properties and Occurrences

Millerite is a nickel sulfide mineral, NiS. It is one of a few sulfide minerals that form fine acicular crystals that appear as hair-like fibers aggregated into sprays. It is brassy in color and has an acicular habit, often forming radiating masses and furry aggregates. It is also called “C.....

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