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Crystal Structure of the Ba4CeNb10O30 Reduced Niobate with a TTB-Type Structure

✍ Scribed by A.V. Mironov; S.Ya. Istomin; O.G. D'yachenko; E.V. Antipov

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 226 KB
Volume: 157
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.2000.9012

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✦ Synopsis

The structure of the cation-de5cient Ba 4.0(1) Ce 0.98(3) Nb 10 O 30 barium cerium reduced niobate with a tetragonal tungsten bronze (TTB) type structure was re5ned from X-ray single crystal data (tetragonal, a ‫؍‬ 12.508(2) A s , c ‫؍‬ 3.9328(4) A s , S. G. P4/mbm, Z ‫؍‬ 1, R ‫؍‬ 0.019, R w ‫؍‬ 0.023). It was found that rare earth substitution for Ba is accompanied by formation of vacancies in A sites. Vacancies were preferably formed in the A(1) cavities in the structure.

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