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Journal of Structural Chemistry

, Volume 60, Issue 5, pp 763–771 | Cite as

Cation Distribution in the Composite Materials of the CaFe2O4-α-Fe2O3 Series

  • Yu. V. KnyazevEmail author
  • N. N. Shishkina
  • O. A. Bayukov
  • N. P. Kirik
  • L. A. Solovyov
  • A. M. Zhizhaev
  • E. V. Rabchevsky
  • A. G. Anshits
Article

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.

Keywords

solid-phase synthesis scanning electron microscopy Mössbauer spectroscopy cation vacancies 

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • Yu. V. Knyazev
    • 1
    Email author
  • N. N. Shishkina
    • 2
  • O. A. Bayukov
    • 1
  • N. P. Kirik
    • 2
  • L. A. Solovyov
    • 2
  • A. M. Zhizhaev
    • 2
  • E. V. Rabchevsky
    • 2
  • A. G. Anshits
    • 2
  1. 1.Kirensky Institute of Physics, Federal Krasnoyarsk Research Center, Siberian BranchRussian Academy of SciencesKrasnoyarskRussia
  2. 2.Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian BranchRussian Academy of SciencesKrasnoyarskRussia

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