Description | Arthurite, CuFe2(AsO4,PO4,SO4)2·4H2O (hydrated copper iron arsenate phosphate sulfate hydroxide), is a rare copper iron arsenate. It is typically green and forms small acicular crystals. Arthurite lends its name to a small group of rather obscure minerals called the Arthurite Group. The Arthurite Group is a group of monoclinic, hydrated iron arsenates and phosphates. |