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Minerals

Naturally occurring substance that is solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and has an ordered atomic structure. It is different from a rock, which can be an aggregate of minerals or non-minerals, and does not have a specific chemical composition. The general definition of a mineral encompasses the following criteria: 1 - Naturally occurring 2 - Stable at room temperature 3 - Represented by a chemical formula 4 - Usually abiogenic 5 - Ordered atomic arrangement

Industry: Geology; Mining

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Minerals

steacyite

Geology; Minerals

Steacyite is a complex silicate mineral containing thorium and uranium; formula K variable (Ca,Na) 2 (Th,U)Si 8 O 20 . It forms small brown or yellow green crystals, often cruciform twinned crystals. ...

acanthite

Geology; Minerals

Acanthite, Ag 2 S, crystallizes in the monoclinic system and is the stable form of silver sulfide below 173 °C. Argentite is the stable form above that temperature. As argentite cools below that ...

aheylite

Geology; Minerals

Aheylite is a rare phosphate mineral with formula (Fe 2+ Zn)Al 6 ((OH) 4

balangeroite

Geology; Minerals

Balangeroite is found in one of the most important chrysotile mines in Europe, the Balangero Serpentinite. It is considered an asbestiform in an assemblage of other mineral phases like chrysotile, ...

bayleyite

Geology; Minerals

Bayleyite is an uranium carbonate mineral with the chemical formula: Mg 2 (UO 2 )(CO 3 ) 3 ·18(H 2 O). It is a secondary mineral which contains magnesium, uranium and carbon. It is a bright yellow ...

fornacite

Geology; Minerals

Fornacite is a rare lead, copper chromate arsenate hydroxide mineral with the formula: Pb 2 Cu(CrO 4 )(AsO 4 )(OH). It forms a series with the phosphate mineral vauquelinite. It forms variably green ...

meyerhofferite

Geology; Minerals

Meyerhofferite is a hydrated borate mineral, with the chemical formula Ca 2 B 6 O 6 (OH) 10 ·2(H 2 O), CaB 3 O 3 (OH) 5 ·H 2 O or Ca 2 (H 3 B 3 O 7 ) 2 ·4(H 2 O). It occurs principally as an ...

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