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(mineralogy) A reddish mineral, a mixed chloride and vanadate of lead with the chemical formula Pb₅(VO₄)₃Cl, that is commercial source of vanadium.

Vanadinite

(mineralogy) A reddish mineral, a mixed chloride and vanadate of lead with the chemical formula Pb₅(VO₄)₃Cl, that is commercial source of vanadium.

Bright red, orange-red, red-brown, brown, yellow, whitish, grey or colourless or weakly tinted in transmitted light; pale straw-yellow;. may be concentrically zoned – Prismatic or nodular; may be acicular, hairlike, fibrous; rarely rounded, globular – None – Uneven to conchoidal – Brittle – 3–4 – Resinous to sub-adamantine – Brownish yellow – Transparent, translucent or opaque – 6.8–7.1 (measured) 6.95 (calculated) – Uniaxial (−) – Nω = 2.416, nε = 2.350 – Δ = 0.066 – Red-orange under near-UV (405nm) – 3,470 °F (1,910 °C).

(mineralogy) A reddish mineral, a mixed chloride and vanadate of lead with the chemical formula Pb₅(VO₄)₃Cl, that is commercial source of vanadium.

Crystal packing