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Synthesis and crystal structure of Ca9Cu1.5(PO4)(7) and reinvestigation of Ca9.5Cu(PO4)(7)статья
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: Belik A.A., Yanov O.V., Lazoryak B.I.
- Журнал: Materials Research Bulletin
- Том: 36
- Номер: 10
- Год издания: 2001
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 1863
- Последняя страница: 1871
- DOI: 10.1016/S0025-5408(01)00666-3
- Аннотация: Ca9Cu1.5(PO4)(7) was synthesized by the solid-state method at 1273 K followed by quenching in air. Crystal structure of Ca9Cu1.5(PO4)(7) was refined by the Rietveld method: space group R3c, a = 10.3379(1) Angstrom, c = 37.1898(3) Angstrom, Z = 6 with R-wp = 4.87%, R-p = 3.67%, S = 1.58, R-I = 2.42%, R-F = 1.07%. The structure of Ca9Cu1.5(PO4)(7) is isotypic with beta -Ca-3(PO4)(2) and Ca9.5Cu(PO4)(7). The M(5) site is fully occupied, and the M(4) site is half occupied by copper canons. The M(1)-M(3) sites are occupied by calcium canons. Copper canons in the M(4) site are displaced from the threefold axis due to long distances M(4)-O. Reinvestigation of crystal structure of Ca9.5Cu(PO4)(7) showed that the M(5) site is occupied by 0.79(1)Cu2+ + 0.21Ca(2+), and other copper canons locate in the M(4) site. (C) 2001 Elsevier Science Ltd. All rights reserved.
- Добавил в систему: Лазоряк Богдан Иосипович