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New series of triple molybdates AgA3R(MoO4)5 (A = Mg, R = Cr, Fe; A = Mn, R = Al, Cr, Fe, Sc, In) with framework structures and mobile silver ion sublatticesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 июня 2016 г.
- Авторы: Kotova I.Yu, Solodovnikov S.F., Solodovnikova Z.A., Белов Дмитрий, Stefanovich S.Yu, Savina A.A., Khaikina E.G.
- Журнал: Journal of Solid State Chemistry
- Том: 238
- Год издания: 2016
- Издательство: Elsevier B.V.
- Местоположение издательства: Netherlands
- Первая страница: 121
- Последняя страница: 128
- DOI: 10.1016/j.jssc.2016.03.003
- Аннотация: Triple molybdates AgA3R(MoO4)5 (A=Mg, R=Cr, Fe; A=Mn, R=Al, Cr, Fe, Sc, In) of the NaMg3In(MoO4)5 type were synthesized and single crystals of AgMg3R(MoO4)5 (R=Cr, Fe) were grown. In their structures, the MoO4 tetrahedra, pairs and trimers of edge-shared (Mg, R)O6 octahedra are connected by common vertices to form a 3D framework. Large framework cavities involve Ag+ cations disordered on three nearby positions with CN=3+1 or 4+1. Alternating (Mg, R)O6 octahedra and MoO4 tetrahedra in the framework form quadrangular windows penetrable for Ag+ at elevated temperatures. Above 653–673 K, the newly obtained molybdates demonstrate abrupt reduction of the activation energy to 0.4–0.6 eV. At 773 K, AgMg3Al(MoO4)5 shows electric conductivity 2.5•10−2 S/cm and Ea=0.39 eV compatible with characteristics of the best ionic conductors of the NASICON type.
- Добавил в систему: Стефанович Сергей Юрьевич