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Uranium substitution for tungsten in the Bi2WO6-Bi2UO6 system Formation of a broad high-temperature solid solutionстатья
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: 18 июля 2013 г.
- Авторы: Charkin Dmitri O., Lebedev Dmitri N., Stefanovich Sergey Yu, Kazakov Sergey M.
- Журнал: Solid State Sciences
- Том: 12
- Номер: 12
- Год издания: 2010
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 2079
- Последняя страница: 2085
- DOI: 10.1016/j.solidstatesciences.2010.09.002
- Аннотация: Polythermic studies of Bi2WO6-Bi2UO6 system revealed existence of a broad Bi2W1-xUxO6 solid solution with the Aurivillius-type structure Below 750 degrees C the homogeneity area is narrow (x <= 0 12) but extends significantly at higher temperatures (up to ca 75% Bi2UO6 at 1025 degrees C) The solid solution retains orthorhombic symmetry over the entire compositional range but substitution of U for W results in significant lowering of second harmonic intensity and Curie point suggesting at high substitution degrees a very close approach to the archetypic body-centered tetragonal centrosymmetric structure The known Bi2WO6-based solid solutions are discussed in terms of thermal stability and a general geometrical explanation is suggested Incorporation of large cations into the B perovskitic positions of [Bi2O2][A(n-1)BnO(3n+1)] Aurivillius structures seems yet to be restricted by the n = 1 case (C) 2010 Elsevier Masson SAS All rights reserved
- Добавил в систему: Казаков Сергей Михайлович