Although the ideal composition for vanadinite is Pb5(VO4)3Cl, phosphorus and arsenic often substitute for vanadium in the mineral’s crystal lattice. This results in a wide range of compositions which influence the specific gravity, color, and other properties. A solid solution series exists between vanadinite and and mimetite Pb5(AsO4)3Cl. Small amounts of calcium, zinc and copper can substitute for lead.
Uses of Vanadinite
Vanadinite, along with carnotite and roscoelite, are important ores of vanadium metal. Vanadinite is also a minor ore of lead. Both vanadium and lead are produced wherever vanadinite is mined. Vanadinite is very popular as a specimen with mineral collectors. They enjoy its bright colors, showy hexagonal crystals, resinous color, and adamantine luster.