Fluorine-Ionic Conductivity of Superionic Conductor Crystals Na0.37Tb0.63F2.26
- Autores: Sorokin N.1, Karimov D.1, Volchkov I.1, Grigor’ev Y.1, Sobolev B.1
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Afiliações:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences
- Edição: Volume 64, Nº 4 (2019)
- Páginas: 626-630
- Seção: Physical Properties of Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/194118
- DOI: https://doi.org/10.1134/S1063774519040229
- ID: 194118
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Resumo
The temperature dependence (in the range of 479–827 K) of the fluorine-ionic conductivity of nonstoichiometric Na0.37Tb0.63F2.26 crystals with fluorite-type structure (sp. gr. \(Fm\bar {3}m\), lattice parameter a = 5.5785(1) Å) has been investigated. The crystals were grown from melt by the Bridgman method in a fluorinating atmosphere of CF4. The formation of cuboctahedral clusters of defects {(Na,Tb)8[Tb6F37]F32} is most likely in the structure of Na0.37Tb0.63F2.26 crystals. The ionic conductivity is found to be σdc = 2.6 × 10–6 and 3 × 10–3 S/cm at 500 and 827 K, respectively. A crystallophysical model of ion transport in Na0.37Tb0.63F2.26 crystals is proposed. The concentration and carrier mobility are calculated to be, respectively, nmob = 1.45 × 1021 cm–3 and μmob = 1.1 × 10–8 cm2/(s V) at 500 K.
Sobre autores
N. Sorokin
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Autor responsável pela correspondência
Email: nsorokin1@yandex.ru
Rússia, Moscow, 119333
D. Karimov
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: nsorokin1@yandex.ru
Rússia, Moscow, 119333
I. Volchkov
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: nsorokin1@yandex.ru
Rússia, Moscow, 119333
Yu. Grigor’ev
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: nsorokin1@yandex.ru
Rússia, Moscow, 119333
B. Sobolev
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: nsorokin1@yandex.ru
Rússia, Moscow, 119333