AM_Zippeite_3 Formula: U4 S2 N4 O21 H2 Name: Zippeite Unit cell: 8.6987 14.166 17.847 90.0 104.117 90.0 , V=2132.79 Space group: C12/M1 (12)

Burns P C , Deely K M , Hayden L A , The Canadian Mineralogist , 41 (2003) p.687-706, The crystal chemistry of the zippeite group, Sample: SZIPPNH4I