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New Fluoridozirconate with the Nonstoichiometric Composition Cs1+x(H2O)1–xMgZr2F11+x·2H2O (x ≈ 0.73): Structure and Thermal Properties

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Abstract

New fluoridozirconate with the nonstoichiometric composition Cs1+x(H2O)1–xMgZr2F11+x·2H2O (x ≈ 0.73) (I) is synthesized, its structure is determined, and the thermal behavior is analyzed. In the structure a part of F atoms is split over two positions which results in the formation of two types of coordination polyhedra around the Zr atom: Hoard dodecahedron ZrF8 and pentagonal bipyramid ZrF7. There are also two types of combining Zr polyhedra into chains: by sharing edges and by sharing edges and vertices. MgF4(H2O)2 octahedra link infinite zirconium chains into layers. Between the layers cesium cations are located together with H2O molecules statistically replacing a part of cesium cations. Dehydration of I occurs in the temperature range 140–400 °C and is complicated by the process of its partial pyrohydrolysis.

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Authors and Affiliations

  1. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia

    K. A. Gaivoronskaya, A. V. Gerasimenko & N. A. Didenko

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  1. K. A. Gaivoronskaya
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  2. A. V. Gerasimenko
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  3. N. A. Didenko
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Correspondence to K. A. Gaivoronskaya.

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Original Russian Text © 2018 K. A. Gaivoronskaya, A. V. Gerasimenko, N. A. Didenko.

Translated from Zhurnal Strukturnoi Khimii, Vol. 59, No. 3, pp. 640–648, March-April, 2018.

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Gaivoronskaya, K.A., Gerasimenko, A.V. & Didenko, N.A. New Fluoridozirconate with the Nonstoichiometric Composition Cs1+x(H2O)1–xMgZr2F11+x·2H2O (x ≈ 0.73): Structure and Thermal Properties. J Struct Chem 59, 618–626 (2018). https://doi.org/10.1134/S0022476618030162

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  • DOI: https://doi.org/10.1134/S0022476618030162

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