Structural stabilization of Fe4+ Ions in perovskite-like phases based on the BiFeO3-SrFeO y system

Compounds of the formula Bi1 - x Sr (x) FeO3 - delta with a perovskite structure are prepared by the solid-phase synthesis at the oxygen partial pressure p = 1 atm and studied. An analysis of the experimental data obtained using Mossbauer spectroscopy and X-ray diffractometry allows us to make the inferences regarding the structure of the samples under investigation and the charge state and symmetry of the local environment of iron atoms.