Point defect parameters for β-PbF2 from a computer analysis of measurements of ionic conductivity |
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Authors: | A Azimi VM Carr AV Chadwick FG Kirkwood R Saghafian |
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Institution: | University Chemical Laboratory, University of Kent, Canterbury, Kent CT2 7NH, England |
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Abstract: | The conductivity of four crystals of β-PbF2 has been measured. The results for three of these crystals, one doped with La3+ and two doped with Na + impurity, have been analysed with a non-linear least squares programme to yield the thermodynamic parameters of defect formation and migration below the superionic transition. These parameters are compared with previous values and are used to provide estimates of the defect concentrations in the superionic phase. This work suggests that the superionic phase is not massively disordered and that β-PbF2 is not significantly different from other fluorites. |
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