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Effect of the ionic radius on jump frequencies of alkaline earth cations in NaCl crystals

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Czechoslovak Journal of Physics B Aims and scope

Abstract

By comparing diffusion coefficientsD of bivalent cations Ba2+, Ca2+, Sr2+ in NaCl crystals it was shown that in the temperature range above 550 °CD (Ba2+)>D (Sr2+)>D (Ca2+) is valid. Temperature dependences of jump frequenciesw 2 of these cations are described byw 2 (Ba2+)=(2·15±0·55) × 1012 × exp {−(0·817±0.007)/kT};w 2 (Sr2+)=(2·9±1·1) × 1012 × exp {−(0·84±0.02)/kT} andw 2 (Ca2+)=(5·5±6·5) × 1010 × exp {−(0·51±0·07)/kT}. It was demonstrated that in NaCl crystals the activation enthalpy and the preexponential factor of the jump frequencyw 2 increase with increasing ionic radius and mass of the bivalent alkaline earth cation.

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Authors and Affiliations

  1. Institute of Physics, Slovak Acad. Sci., Bratislava, Dúbravska cesta, 89930, Bratislava, Czechoslovakia

    V. Trnovcová, E. Majková & J. Grňo

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  1. V. Trnovcová
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  2. E. Majková
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  3. J. Grňo
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Trnovcová, V., Majková, E. & Grňo, J. Effect of the ionic radius on jump frequencies of alkaline earth cations in NaCl crystals. Czech J Phys 24, 971–980 (1974). https://doi.org/10.1007/BF01591048

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  • DOI: https://doi.org/10.1007/BF01591048

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