20 Terms
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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
arsenopyrite
Geology; Minerals
Arsenopyrite is an iron arsenic sulfide (FeAsS). It is a hard (Mohs 5.5-6) metallic, opaque, steel grey to silver white mineral with a relatively high specific gravity of 6.1. When dissolved in ...
pyroxferroite
Geology; Minerals
Pyroxferroite (Fe 2+ ,Ca)SiO 3 is a single chain inosilicate. It is mostly composed of iron, silicon and oxygen, with smaller fractions of calcium and several other metals. Together with armalcolite ...
pharmacosiderite
Geology; Minerals
Pharmacosiderite is a hydrated basic ferric arsenate, with chemical formula KFe 4 (AsO 4 ) 3 (OH) 4 ·(6-7)H 2 O and a molecular weight of 873.38 g/mol. It consists of the elements arsenic, iron, ...
