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Perovskite-like modification of Cs3Sb2I9 as a member of theOD family A3B2X9

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Abstract

The structure of the trigonal modification of Cs3Sb2I9was refined by XRD methods (Syntex {ie572-1} diffractometer, λMoKα at T = 285 K. The structure is ofperovskite type A3B3-xX9 with ordered vacancies in the B-sublattice. The unit cell with pseudo-R-centering has the following parameters: α = 8.435(7), c = 10.390(7) Å, V = 757.5 Å3, Z = 1; dx = 4.67 g/cm3. The centrosymmetric space group {ie572-2} was chosen based on the laser radiation second harmonic generation test. The parameters of the pseudo-rhombohedron corresponding to the perovskite cell are a’ = 5.976 å, α = 89.78°. The R-lattice of a perovskite structure is disturbed by ordered Sb vacancies in one of the three I6, octahedra. The structural modifications of the compounds A3B2X9 are analyzed in terms of Dornberger-Schiffs OD theory as the members of the family formed by the two-dimensional periodic fragments ofperovskite type structures.

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Authors and Affiliations

  1. Institute of Metallurgy, Russian Academy of Sciences (Moscow), Russia

    A. V. Arakcheeva, M. S. Novikova, A. I. Zaitsev & G. U. Lubman

  2. Institute of Crystallography, Russian Academy of Sciences (Moscow), Russia

    A. V. Arakcheeva, M. S. Novikova, A. I. Zaitsev & G. U. Lubman

  3. L. V. Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences (Krasnoyarsk), Russia

    A. V. Arakcheeva, M. S. Novikova, A. I. Zaitsev & G. U. Lubman

Authors
  1. A. V. Arakcheeva
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  2. M. S. Novikova
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  3. A. I. Zaitsev
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  4. G. U. Lubman
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Arakcheeva, A.V., Novikova, M.S., Zaitsev, A.I. et al. Perovskite-like modification of Cs3Sb2I9 as a member of theOD family A3B2X9 . J Struct Chem 40, 572–579 (1999). https://doi.org/10.1007/BF02700720

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  • DOI: https://doi.org/10.1007/BF02700720

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