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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
buddingtonite
Geology; Minerals
Buddingtonite is an ammonium feldspar with formula: NH 4 AlSi 3 O 8 (note: some sources add 0.5H 2 O to the formula). It forms in hydrothermal areas by alteration of primary feldspar minerals. It is ...
connellite
Geology; Minerals
Connellite is a very rare mineral species, a hydrous copper chloro-sulfate, Cu 19 ((OH) 32
hydrotalcite
Geology; Minerals
Hydrotalcite is a layered double hydroxide of general formula (Mg 6 Al 2 (CO 3 )(OH) 16 ·4(H 2 O), whose name is derived from its resemblance with talc and its high water content. The layers of the ...
cristobalite
Geology; Minerals
The mineral cristobalite is a high-temperature polymorph of silica, meaning that it has the same chemical formula, SiO 2 , but a distinct crystal structure. Both quartz and cristobalite are ...
alacránite
Geology; Minerals
Alacránite (As 8 S 9 ) is an arsenic sulfide mineral first discovered in the Uzon caldera, Kamchatka, Russia. It was named for its occurrence in the Alacrán silver, arsenic, antimony mine, Pampa ...
