AM_Rollandite Formula: Cu3 As2 O12 H8 Name: Rollandite Unit cell: 5.6906 17.061 9.732 90.0 90.0 90.0 , V=944.85 Space group: PNMA (62)

Sarp H , Cerny R , European Journal of Mineralogy , 12 (2000) p.1045-1050, Rollandite, Cu3(AsO4)2.4H2O, a new mineral: its description and crystal structure