Ionic and electronic conductivity has been measured in and . Ionic conductivity was measured by using as a blocking electrode for electronic conduction. Transference numbers were confirmed by cells of the type . Ionic conductivities were for and , respectively, at room temperature. The conductivity of increases abruptly at ∼170°C to ∼1 (Ω‐cm) −1 . A transition at this temperature was observed by DSC.
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MURPHY et al. (1977) studied this question.
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