What is "vauquelinite"

Vauquelinite \Vauque"lin*ite\, n. [So called after the French chemist Vauquelin, who died in 1829: cf. F. vauquelinite.] (Min.) Chromate of copper and lead, of various shades of green.

n. (context mineralogy English) A complex mineral, a combined chromate and phosphate of copper and lead.

Vauquelinite is a complex mineral with the formula Cu Pb( Cr O)( PO)(O H) making it a combined chromate and phosphate of copper and lead. It forms a series with the arsenate mineral fornacite.

It was first described in 1818 in the Beryozovskoye deposit, Urals, Russia, and named for Louis Vauquelin (1763–1829), a French chemist. It occurs in oxidized hydrothermal ore deposits and is associated with crocoite, pyromorphite, mimetite, cerussite, beudantite and duftite at the type locality in Russia.