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Journal of Structural Chemistry

, Volume 59, Issue 7, pp 1572–1579 | Cite as

Ionic Mobility in Pb0.9M0.1F2.1 (M = Bi, In) and Pb0.9Bi0.05In0.05F2.1 Solid Solutions with the Fluorite-Type Structure According NMR Data

  • V. Ya. KavunEmail author
  • E. B. Merkulov
  • A. B. Slobodyuk
  • M. M. Polyantsev
  • O. V. Brovkina
Article

Abstract

Ionic mobility in solid solutions Pb0.9Bi0.1F2.1, Pb0.9In0.1F2.1, and Pb0.9Bi0.05In0.05F2.1 with the fluorite structure is studied with the 19F NMR method at 150–470 K. Temperature regions associated with local motions in the fluoride sublattice of these solid solutions are determined. The ratio of “fixed” (in the NMR scale) and mobile fluoride ions in the transition region (200-300 K) depends on the temperature, concentration of MF3 fluorides, and the nature of M3+ cations. Translational diffusion of fluoride ions is the predominant ionic motion in solid solutions above 300 K to cause high ionic conductivity in the samples.

Keywords

solid solutions ionic mobility XRD 19F NMR spectra 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • V. Ya. Kavun
    • 1
    Email author
  • E. B. Merkulov
    • 1
  • A. B. Slobodyuk
    • 1
  • M. M. Polyantsev
    • 1
  • O. V. Brovkina
    • 1
  1. 1.Institute of Chemistry, Far East BranchRussian Academy of SciencesVladivostokRussia

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