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Inverse correlation between the ionic and thermal conductivities of single crystals of M1–x R x F2 + x (M = Ca, Ba; R—rare-earth element) fluorite solid solutions

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Abstract

The logarithm of the 500-K fluoride ion conductivity of M1–x R x F2 + x (M = Ca, Ba; R = rare-earth element) crystals is shown to be inversely correlated with their 100-K thermal conductivity: materials with high ionic conductivity have low thermal conductivity and vice versa. For groups of solid solutions containing defect clusters similar in structure, the correlation coefficient is about 0.85.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    P. P. Fedorov

  2. Shubnikov Institute of Crystallography, Crystallography and Photonics Federal Research Center, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333, Russia

    N. I. Sorokin

  3. Petrovskii State University, Bezhitskaya ul. 14, Bryansk, 241036, Russia

    P. A. Popov

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  1. P. P. Fedorov
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  2. N. I. Sorokin
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Correspondence to P. P. Fedorov.

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Original Russian Text © P.P. Fedorov, N.I. Sorokin, P.A. Popov, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 6, pp. 639–645.

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Fedorov, P.P., Sorokin, N.I. & Popov, P.A. Inverse correlation between the ionic and thermal conductivities of single crystals of M1–x R x F2 + x (M = Ca, Ba; R—rare-earth element) fluorite solid solutions. Inorg Mater 53, 626–632 (2017). https://doi.org/10.1134/S0020168517060036

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  • DOI: https://doi.org/10.1134/S0020168517060036

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