vanadinite

noun

1. a mineral, Pb5(VO4)3Cl, occurring in yellow, brown, or greenish crystals: an ore of lead and vanadium.

noun

1. a red, yellow, or brownish mineral consisting of a chloride and vanadate of lead in hexagonal crystalline form. It results from weathering of lead ores in desert regions and is a source of vanadium. Formula: Pb 5 (VO 4) 3 Cl