AM_Pyrrhotite_1 Formula: Fe17.574 Ni.24 S20 Name: Pyrrhotite Unit cell: 6.893 11.939 28.635 90.0 90.0 90.0 , V=2356.53 Space group: CMCA (64)

de Villiers J P R , Liles D C , Becker M , American Mineralogist , 94 (2009) p.1405-1410, The crystal structure of a naturally occurring 5C pyrrhotite, from Sudbury, its chemistry, and vacancy distribution, Locality: Copper Cliff North Mine, Sudbury, Canada