AM_Pentlandite_37 Formula: (Fe4.23 Ni4.77) S8 Name: Pentlandite Unit cell: 10.095 10.095 10.095 90.0 90.0 90.0 , V=1028.77 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: Natural, Fe/(Fe+Ni) = .470, T = 423 K, P = 0 GPa, Note: structure was not refined in this study