Structure of new metastable cubic TbO2-x

A new structure of TbO2-x with the space group has been solved using single crystal diffraction techniques. From the structure refinement, a significant deficiency is found on one of the two oxygen sites which results in the TbO1.68(6) composition. Two types of Tb atoms with different bond valence s...

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Bibliographic Details
Published in:Journal of alloys and compounds 2008-03, Vol.452 (2), p.254-257
Main Authors: AHMADPOUR, Faraz, MOZHARIVSKYJ, Yurij
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Inorganic compounds
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:A new structure of TbO2-x with the space group has been solved using single crystal diffraction techniques. From the structure refinement, a significant deficiency is found on one of the two oxygen sites which results in the TbO1.68(6) composition. Two types of Tb atoms with different bond valence sums and thus with two oxidation states exist in the structure. The phase does not obey the stability rules formulated for other oxygen deficient RnO2n-2m phases with R=Ce, Pr and Tb. The phase was obtained at high temperatures and is unstable at room temperature.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2006.11.018