AM_Zippeite_7 Formula: U4 S2 Co2 O27 H14 Name: Zippeite Unit cell: 8.65 14.252 17.742 90.0 104.092 90.0 , V=2121.41 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: Cobalt-zippeite