Citation: Tsukimura K; Nakazawa H; Endo T; Fukunaga O (1992). 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. Physics and Chemistry of Minerals, 19, pp. 203-212.