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
carrollite
Geology; Minerals
Carrollite, CuCo 2 S 4 , is a sulfide of copper and cobalt, often with substantial substitution of nickel for the metal ions, and a member of the linnaeite group. It is named after the type locality ...
mackinawite
Geology; Minerals
Mackinawite is an iron nickel sulfide mineral with formula (Fe,Ni) 1 + x S (where x = 0 to 0.11). It crystallizes in the tetragonal crystal system and occurs as opaque bronze to grey-white tabular ...
pharmacolite
Geology; Minerals
Pharmacolite is an uncommon calcium arsenate mineral with formula CaHAsO 4 ·2(H 2 O). It occurs as soft, white clusters of fibrous crystals and encrustations which crystallize in the monoclinic ...
tincalconite
Geology; Minerals
Tincalconite is a hydrous sodium borate mineral closely related to borax, and is a secondary mineral that forms as a dehydration product of borax. Its formula is Na 2 B 4 O 7 ·5H 2 O or Na 2 (B 4 O 5 ...
cassiterite
Geology; Minerals
Cassiterite is a tin oxide mineral, SnO 2 . It is generally opaque, but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite has been the ...
nenadkevichite
Geology; Minerals
Nenadkevichite is a rare silicate mineral containing niobium with formula: (Na,Ca)(Nb,Ti)Si 2 O 7 ·2H 2 O. It forms brown to yellow to rose colored orthorhombic dipyramidal crystals with a dull to ...
