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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
seifertite
Geology; Minerals
Seifertite is a silicate mineral with the formula SiO 2 and is one of the densest polymorphs of quartz. It has only been found in Martian and lunar meteorites where it is presumably formed from ...
brezinaite
Geology; Minerals
Brezinaite, discovered in 1969, is a rare mineral composed of chromium and sulfur. It is found in meteorites, such as the Irwin-Ainsa meteorite (Tucson meteorite), it's type locality. It was also ...
dmitryivanovite
Geology; Minerals
Dmitryivanovite is a natural mineral composed of calcium, aluminium and oxygen, with the molecular formula CaAl 2 O 4 . It was reported in 2009 in a calcium-aluminium-rich inclusion in the ...
astrophyllite
Geology; Minerals
Astrophyllite is a very rare, brown to golden-yellow hydrous potassium iron titanium silicate mineral. Belonging to the astrophyllite group, astrophyllite may be classed either as an inosilicate, ...
