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Mössbauer spectroscopy is used to study the state of iron atoms in samples with a composition of CuCr1−xFexS2 (x = 0.01–0.30). It is shown that at x ≤ 0.02 samples are solid solutions in which iron atoms have an oxidation number of 3+ and replace chromium atoms in octahedral sites. When the iron concentration increases, the second phase — chalcopyrite CuFeS2 — forms along with the solid solution...
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