Transition of Metastable Pyrrhotites to a Stable Phase State

Onufrienok, V. V.; Chzhan, A. V.; Bondarenko, G. V.; Yurkin, G. Yu. Inorganic Materials. DOI

Equilibrium phase relations of synthetic minerals prepared by annealing metastable iron sulfides, followed by prolonged isothermal storage in the Earth atmosphere, have been studied by X-ray diffraction. The results demonstrate that prolonged storage of synthetic pyrrhotites annealed at different temperatures makes it possible to identify metastable and stable phases of Fe and S compounds.