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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
Contributors in Minerals
Minerals
seligmannite
Geology; Minerals
Seligmanite is a rare mineral, with the chemical formula PbCuAsS 3 . Originally described from the Lengenbach Quarry, Valais Canton, Switzerland; it has also been found in the Raura district, Lima ...
conichalcite
Geology; Minerals
Conichalcite, CaCu(AsO 4 )(OH), is a relatively common arsenate mineral related to duftite (PbCu(AsO 4 )(OH)). It is green, often botryoidal, and occurs in the oxidation zone of some metal deposits. ...
francevillite
Geology; Minerals
Francevillite is a uranyl-group vanadate mineral in the tyuyamunite series. Its chemical formula is (Ba,Pb)(UO 2 ) 2 V 2 O 8 ·5(H 2 O). Francevillite is a strongly radioactive mineral. It is ...
nekrasovite
Geology; Minerals
Nekrasovite is a rare copper vanadium sulfosalt mineral with formula Cu 26 V 2 (Sn,As,Sb) 6 S 32 . It crystallizes in the isometric system and occurs as small grains in ore aggregates. It is a brown ...
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