Characterization of the single phase region with spinel structure in the ternary system In 2S 3FeSFeS 2
The limit of single-phase solid solubility in a spinel host lattice in the system In 2S 3FeSFeS 2 has been determined. Mössbauer spectroscopy showed that all iron is bivalent and, for the major part, occupies the B-sites (δ = 0.81-0.89 mm/s, ∆ = 3.16-3.25 mm/s). The fraction of tetrahedral iron depends on the sample composition and the thermal treatment. Mössbauer spectroscopy also showed the influence of tetrahedral vacancies by causing quadrupole splittings on tetrahedral subspectra (δ = 0.64-0.74 mm/s and ∆ = 0.55-1.07 mm/s).