Nature of ionic conductivity of lanthanide tungstates with imperfect scheelite structure

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• 作者：N. N. Pestereva ; I. A. Vyatkin ; D. A. Lopatin…
• 关键词：lanthanides ; imperfect scheelite ; Tubandt method
• 刊名：Russian Journal of Electrochemistry
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：52
• 期：11
• 页码：1082-1089
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Physical Chemistry;
• 出版者：Pleiades Publishing
• ISSN：1608-3342
• 卷排序：52

文摘

Electric properties of tungstates with imperfect scheelite structure, Ln₂(WO₄)₃ (Ln = La, Sm, Eu), are studied; the charge carrier type is determined in these phases. It is found that the conductivity type of Ln₂(WO₄)₃ is predominantly ionic, though there is a contribution of n-type electron conductivity component in the case of Eu₂(WO₄)₃. The Tubandt method was used to establish a negligible contribution of the [WO₄]2– anion into transport, which, together with the results of the EMF technique, points to the predominantly oxygen character of conductivity.