10 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
switzerite
Geology; Minerals
Switzerite is a mineral with the chemical formula of (Mn) 3 (PO 4 ) 2 ·7H 2 O. The mineral was named after George Switzer, former Curator of Minerals at the US National Museum. The mineral is ...
polyhalite
Geology; Minerals
Polyhalite is an evaporite mineral, a hydrated sulfate of potassium, calcium and magnesium with formula: K 2 Ca 2 Mg(SO 4 ) 4 ·2H 2 O. Polyhalite crystallizes in the triclinic system although ...
silicon nitride
Geology; Minerals
Silicon nitride is a chemical compound of the elements silicon and nitrogen, with the formula Si 3N 4. It is a white, high-melting-point solid that is relatively chemically inert, being attacked by ...
hemimorphite
Geology; Minerals
Hemimorphite, is a sorosilicate mineral which has been mined from days of old from the upper parts of zinc and lead ores, chiefly associated with smithsonite. It was often assumed to be the same ...
tschermakite
Geology; Minerals
The endmember hornblende tschermakite (Ca 2 (Mg,Fe 2+ ) 3 Al 2 (Si 6 Al 2 )O 22 (OH) 2 ) is a calcium rich monoclinic amphibole mineral. It is frequently synthesized along with its ternary solid ...
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