Strontium diffusion in Sr3−3x La2x □x(VO4)2 solid solutions |
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Authors: | O. N. Leonidova I. A. Leonidov G. I. Dontsov A. S. Zhukovskaya |
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Affiliation: | (1) Institute of Solid-State Chemistry, Ural Branch of the Russian Academy of Sciences, 620219 Ekaterinburg, Russia;(2) Urals State Technical University, 620002 Ekaterinburg, Russia |
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Abstract: | Layer-by-layer radiometric analysis in the temperature range 800–950 °C was used to measure the diffusion coefficients of 90Sr, 45Ca, 133Ba radionuclides in Sr3−3x La2x □x(VO4)2 (x=0,0.1,0.15,0.2,0.25) solid solutions. It was established that D Ca * >D Sr * >D Ba * . An increase in the concentrations of vacancies (□) in the strontium sublattice leads to increased coefficients of diffusion of rare-earth metal cations. The activation energies for radionuclide diffusion were determined. It was shown that M2+ cations migrate via Sr(2) positions. Fiz. Tverd. Tela (St. Petersburg) 40, 223–226 (February 1998) |
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