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Structure determination of Sr(1.25)Bi(0.75)O(3) and Sr(0.4)K(0.6)BiO(3) as a function of temperature from synchrotron X-ray powder diffraction dataстатья
Информация о цитировании статьи получена из
Web of Science,
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Bougerol-Chaillout C., Bordet P., Kazakov S.M., Pshirkov J.S., Antipov E.V., Putilin S.N., Dooryhee E., Fitch A.
- Журнал: Journal of Solid State Chemistry
- Том: 150
- Номер: 2
- Год издания: 2000
- Издательство: Elsevier B.V.
- Местоположение издательства: Netherlands
- Первая страница: 316
- Последняя страница: 323
- DOI: 10.1006/jssc.1999.8596
- Аннотация: The structures of Sr(1.25)Bi(0.75)O(3) and superconducting Sr(0.4)K(0.6)BiO(3) have been determined from synchrotron X-ray powder diffraction data between 4 K and the decomposition temperature, at 973 and 573 K, respectively. The symmetry remains monoclinic(a approximate to root 2a(p), b approximate to root 2a(p), c approximate to 2a(p), beta approximate to 90 degrees, P2(1)/n space group with two Bi sites allowing charge localization) for the undoped compound, and tetragonal (a approximate to root 2a(p), c approximate to 2a(p), I4/mcm space group with a unique Bi site implying a charge delocalization) for the K-doped phase, over the whole temperature range. In both cases the distortion from cubic symmetry decreases as temperature increases. Above 400 K, Sr(0.4)K(0.6)BiO(3) progressively loses oxygen until it reaches the Sr(0.4)K(0.6)BiO(2.5) stoichiometry, after which it decomposes. (C) 2000 Academic Press.
- Добавил в систему: Казаков Сергей Михайлович