Vanadinite

vanadate

hydrothermal

Formula: Pb5(VO4)3Cl
Anhydrous vanadate containing halogen
Specific gravity: 6.8 to 7.1
Hardness: 3
Streak: White, yellowish
Colour: Yellow, brown, orange, red
Solubility: Moderately soluble in hydrochloric acid; readily soluble in nitric acid
Environments:

Hydrothermal environments

Vanadinite is a rare secondary mineral found in the oxidation zone of high temperature hydrothermal lead deposits in arid climates, associated with other secondary lead minerals.

At the Whitwell quarry, Derbyshire, England, UK, vanadinite occurs on a baryte - phosphohedyphane matrix (RES p139).

At the Judkins quarry, Nuneaton, Warwickshire, England, UK, vanadinite occurs with mottramite (RES p325).

At the Kabwe mine, Central Province, Zambia, vanadinite is associated with hopeite and descloizite (R&M 94.2.142-143).

Common impurities: P,As,Ca

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