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общая лексика
фольбортит
Volborthite is a mineral containing copper and vanadium, with the formula Cu3V2O7(OH)2·2H2O. Found originally in 1838 in the Urals, it was first named knaufite but was later changed to volborthite for Alexander von Volborth (1800–1876), a Russian paleontologist.
Tangeite (synonym: calciovolborthite), CaCuVO4(OH), is closely related.