AM_Pentlandite_22 Formula: (Fe5.007 Ni3.993) S8 Name: Pentlandite Unit cell: 10.123 10.123 10.123 90.0 90.0 90.0 , V=1037.36 Space group: FM3M (225)

Tsukimura K , Nakazawa H , Endo T , Fukunaga O , Physics and Chemistry of Minerals , 19 (1992) p.203-212, Cation distribution in Pentlandites (Fe,Ni)9S8: dependence of pressure and, temperature and kinetics of the cation exchange reaction, Sample: Synthetic, Fe/(Fe+Ni) = .556, T = 723 K, P = 1 GPa, Note: structure was not refined in this study