AM_Zippeite_1 Formula: U4 S2 K2.71 O23 H7 Name: Zippeite Unit cell: 8.7524 13.9197 17.6972 90.0 104.178 90.0 , V=2090.39 Space group: C121 (5)

Burns P C , Deely K M , Hayden L A , The Canadian Mineralogist , 41 (2003) p.687-706, The crystal chemistry of the zippeite group