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Activation energy for anion disordering in LnF3 (Ln = La, Ce, Pr) superionic crystals

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Abstract

The energetics of lattice disordering in crystals with the LaF3 structure has been studied by Raman spectroscopy. Analysis of the width of Raman lines indicates that, for T < T c (in the dielectric phase of LaF3), the activation energy for anion disordering is E d ≃ 0.20 eV. This value agrees well with the 0.22 eV obtained as the difference between the energies of a fluoride ion in lattice and interstitial sites in a finite crystalline LaF3 cluster.

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Authors and Affiliations

  1. Department of Thermophysics, Academy of Sciences of Uzbekistan, ul. Katartal 28, Tashkent, 100135, Uzbekistan

    V. F. Krivorotov, P. K. Khabibullaev & A. A. Fridman

  2. Tashkent Institute of Chemical Technology, ul. Navoi 32, Tashkent, 100011, Uzbekistan

    Kh. T. Sharipov

Authors
  1. V. F. Krivorotov
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  2. P. K. Khabibullaev
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  3. A. A. Fridman
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  4. Kh. T. Sharipov
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Correspondence to V. F. Krivorotov.

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Original Russian Text © V.F. Krivorotov, P.K. Khabibullaev, A.A. Fridman, Kh.T. Sharipov, 2010, published in Neorganicheskie Materialy, 2010, Vol. 46, No. 7, pp. 875–879.

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Krivorotov, V.F., Khabibullaev, P.K., Fridman, A.A. et al. Activation energy for anion disordering in LnF3 (Ln = La, Ce, Pr) superionic crystals. Inorg Mater 46, 784–788 (2010). https://doi.org/10.1134/S0020168510070174

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  • DOI: https://doi.org/10.1134/S0020168510070174

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