AM_Amarantite Formula: Fe S O8 H7 Name: Amarantite Unit cell: 8.976 11.678 6.698 95.65 90.36 97.2 , V=693.05 Space group: P-1 (2)

Susse P , Zeitschrift fur Kristallographie , 127 (1968) p.261-275, The crystal structure of amarantite, Fe2(SO4)2O*7H2O, Locality: Quetena, Chile