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Thermal and Transport Properties, Ion Mobility, and Phase Transitions in Compounds (NH4)6CsZr4F23 and (NH4)6CsHf4F23

  • Physical Methods of Investigation
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Abstract

Thermal, electrophysical properties, ion mobility, and phase transitions (PT) in compounds (NH4)6CsZr4F23 (I) and (NH4)6CsHf4F23 (II) have been studied by 1H, 19F NMR, X-ray powder diffraction, DSC, and impedance spectroscopy. The types of ion motions in the fluoride and ammonium sublattices of both compounds have been determined in temperature range 150–450 K and their activation energy has been assessed. Phase transitions in compounds I and II has been revealed in temperature range 380–404 and 384–412 K to form high-temperature modifications with diffusion of fluoride and ammonium ions as the main type of ion motions. The high ionic conductivity of compounds I and II (higher 10–4 S/cm at 463 K) allows one to refer these fluoro complexes to the class of superionic conductors.

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Authors and Affiliations

  1. Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia

    V. Ya. Kavun, T. F. Antokhina, N. N. Savchenko, M. M. Polyantsev, A. B. Podgorbunskii & T. A. Kaidalova

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  1. V. Ya. Kavun
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  2. T. F. Antokhina
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  3. N. N. Savchenko
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  4. M. M. Polyantsev
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  5. A. B. Podgorbunskii
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  6. T. A. Kaidalova
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Corresponding author

Correspondence to T. F. Antokhina.

Additional information

Original Russian Text © V.Ya. Kavun, T.F. Antokhina, N.N. Savchenko, M.M. Polyantsev, A.B. Podgorbunskii, T.A. Kaidalova, 2018, published in Zhurnal Neorganicheskoi Khimii, 2018, Vol. 63, No. 1, pp. 83–93.

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Kavun, V.Y., Antokhina, T.F., Savchenko, N.N. et al. Thermal and Transport Properties, Ion Mobility, and Phase Transitions in Compounds (NH4)6CsZr4F23 and (NH4)6CsHf4F23. Russ. J. Inorg. Chem. 63, 78–88 (2018). https://doi.org/10.1134/S0036023618010102

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  • DOI: https://doi.org/10.1134/S0036023618010102

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