Abstract
Structured composite materials CaFe2O4-α-Fe2O3 (α-Fe2O3 content is 2–82 wt.%) are obtained with the method of solid-phase synthesis at 1000 °C. The phase composition of the samples is studied using powder X-ray diffraction. It is shown that the content of CaFe2O4 and α-Fe2O3 phases changes linearly, depending on the composition of the starting material. The scanning electron microscopy data indicate the formation of a two-phase system α-Fe2O3-CaFe2O4. The Mössbauer spectroscopy data at room temperature testify the formation of cationic iron vacancies in the CaFe2O4 crystal structure in the absence of α-Fe2O3 structural defects. Cationic vacancies can be formed during the synthesis in the atmosphere of air.
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Russian Text © The Author(s), 2019, published in Zhurnal Strukturnoi Khimii, 2019, Vol. 60, No. 5, pp. 796-805.
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Knyazev, Y.V., Shishkina, N.N., Bayukov, O.A. et al. Cation Distribution in the Composite Materials of the CaFe2O4-α-Fe2O3 Series. J Struct Chem 60, 763–771 (2019). https://doi.org/10.1134/S0022476619050081
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DOI: https://doi.org/10.1134/S0022476619050081