Volborthite
From Wikipedia, the free encyclopedia
Calciovolborthite, Montrose County, Colorado
Volborthite is a mineral containing copper and vanadium, with the formula Cu3V2O7(OH)2·2H2O. Found originally in 1838 in the Urals, it was named for Alexander von Volborth (1800-1876), a Russian paleontologist.
Calciovolborthite, CaCuVO4(OH), is closely related.

