Magnetic Phase Relations of Pyrrhotite

摘要: A series of iron sulphide compositions containing between 50 and 46.0 atomic percent has been synthesized the products syntheses annealed at 701, 350, 300 144°C. The charges were examined in polished sections by X-ray powder photography, electron microprobe analysis Mossbauer spectroscopy, thermomagnetic properties over a 25-350°C temperature range.The data used to construct magnetic phase diagrams. Detailed information from these diagrams, together with studies, suggest that discrete stoichiometric or near phases may occur low temperatures. FeS, Fe7S8 Fe9S10 appear be such phases, Fe10S11 Fe11S12 further examples. These represent different vacancy ordering patterns explain frequent occurrence two-phase intergrowths natural pyrrhotites. diagrams are required for finely intergrown pyrrhotites also provide relevant characteristics pyrrhotite-containing ore bodies.