AM_Ullmannite_1 Formula: (Ni1.94 Co.06) S1.97 As.195 Sb1.815 Bi.02 Name: Ullmannite Unit cell: 5.886 5.886 5.886 90.0 90.0 90.0 , V=203.92 Space group: P1 (1)

Bayliss P , American Mineralogist , 62 (1977) p.369-373, Crystal structure refinement of arsenian ullmannite