Geology

Geology

The scientific study of the origin, history, and physical features of the earth.

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Geology > Minerals

petalite

Geology; Minerals

Petalite, also known as castorite, is a lithium aluminium phyllosilicate mineral LiAlSi 4 O 10 , crystallizing in the monoclinic system. Petalite is a member of the feldspathoid ...

antlerite

Geology; Minerals

Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu 3 (SO 4 )(OH) 4 . It occurs in tabular, acicular, or fibrous crystals with a vitreous luster. ...

hedenbergite

Geology; Minerals

Hedenbergite, CaFeSi 2 O 6 , is the iron rich end member of the pyroxene group having a monoclinic crystal system. The mineral is extremely rarely found as a pure substance, and ...

macaulayite

Geology; Minerals

Macaulayite is a red, earthy, monoclinic mineral, with the chemical formula (Fe 3+ , Al) 24 Si 4 O 43 (OH) 2 . It was discovered in the 1970s by Dr Jeff Wilson and named after the ...

skutterudite

Geology; Minerals

Skutterudite is a cobalt arsenide mineral that has variable amounts of nickel and iron substituting for cobalt with a general formula: (Co,Ni,Fe)As 3 . Some references give the ...

suessite

Geology; Minerals

Suessite is a rare iron silicide mineral with chemical formula: Fe 3 Si. The mineral was named after Professor Hans E. Suess. It was discovered in 1982 during the chemical ...

akaganéite

Geology; Minerals

Akaganéite is an iron(III) oxide-hydroxide / chloride mineral with formula: Fe 3+ O(OH,Cl) e.g.; β-FeO(OH). It is formed by the weathering of pyrrhotite (Fe 1-x S). Nickel also ...