Geology

Geology

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

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Geology > Minerals

seligmannite

Geology; Minerals

Seligmanite is a rare mineral, with the chemical formula PbCuAsS 3 . Originally described from the Lengenbach Quarry, Valais Canton, Switzerland; it has also been found in the ...

siderotil

Geology; Minerals

Siderotil is an iron(II) sulfate hydrate mineral with formula: FeSO 4 ·5H 2 O which forms by the dehydration of melanterite. Copper commonly occurs substituting for iron in the ...

titanite

Geology; Minerals

Titanite, or sphene (from the Greek sphenos (σφηνώ), meaning wedge ), is a calcium titanium nesosilicate mineral, CaTiSiO 5 . Trace impurities of iron and aluminium are typically ...

conichalcite

Geology; Minerals

Conichalcite, CaCu(AsO 4 )(OH), is a relatively common arsenate mineral related to duftite (PbCu(AsO 4 )(OH)). It is green, often botryoidal, and occurs in the oxidation zone of ...

francevillite

Geology; Minerals

Francevillite is a uranyl-group vanadate mineral in the tyuyamunite series. Its chemical formula is (Ba,Pb)(UO 2 ) 2 V 2 O 8 ·5(H 2 O). Francevillite is a strongly radioactive ...

tantite

Geology; Minerals

Tantite is a rare tantalum oxide mineral with formula: Ta 2 O 5 . Tantite forms transparent microscopic colorless triclinic - pedial crystals with an adamantine luster. It has a ...

nekrasovite

Geology; Minerals

Nekrasovite is a rare copper vanadium sulfosalt mineral with formula Cu 26 V 2 (Sn,As,Sb) 6 S 32 . It crystallizes in the isometric system and occurs as small grains in ore ...