Pascoite

pascoite

carnotite

vanadium

Images

Formula: Ca3V5+10O28.17H2O
Vanadium oxysalt, pascoite group
Specific gravity: 2.455
Hardness: 2½
Streak: Cadmium-yellow
Colour: Dark red-orange to yellow-orange, dirty yellow upon partial dehydration
Solubility: Soluble in water
Environments

Sedimentary environments
Hydrothermal environments

Pascoite is widely distributed in sedimentary uranium-vanadium deposits (Dana), as a secondary mineral occurring as a leachate of near-surface vanadium oxides by ground waters and as efflorescences in mine tunnels. Carnotite is a commonly associated mineral (HOM, Mindat).

Localities

At the type locality, the Ragra Mine, Huayllay District, Pasco Province, Pasco, Peru, pascoite occurs as efflorescences in mine tunnels

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