Bonding and structural variations in doped Bi{sub 2}Sn{sub 2}O{sub 7}
Journal Article
·
· Journal of Solid State Chemistry
OSTI ID:576430
- Univ. of Sydney (Australia)
- Australian Nuclear Science and Technology Organization, New South Wales (Australia)
- Brookhaven National Lab., Upton, NY (United States)
The structural properties of Y-doped Bi{sub 2}Sn{sub 2}O{sub 7} have been determined by Rietveld analysis of powder neutron and synchrotron X-ray diffraction data. These materials form a series of cubic pyrochlore-type oxides with a distinct miscibility gap at low Bi contents and show large deviations from Vegards law. Temperature-dependent structural studies of (BiY)Sn{sub 2}O{sub 7} and (BiYb) Sn{sub 2}O{sub 7} have been undertaken. The structure of the high temperature, pyrochlore phase of Bi{sub 2}Sn{sub 2}O{sub 7} has been refined using powder neutron diffraction data. The evolution of the charge density on the Bi site has been probed using a combination of bond valence sum calculations and electronic spectroscopy.
- OSTI ID:
- 576430
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 131; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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