Tags: Chemical Substance, Mineral.
Fornacite is a rare lead copper chromate arsenate hydroxide mineral with the formula: Pb2Cu(CrO4)(AsO4)(OH). It forms a series with the phosphate mineral vauquelinite. It forms variably green to yellow translucent to transparent crystals in the monoclinic – prismatic crystal system. It has a Mohs hardness of 2.3 and a specific gravity of 6.27.It was first described in 1915 and named after Lucien Lewis Forneau (1867–1930) the governor of the French Congo.
