Ashbrook, S. E. and Whittle, K. R. and Lumpkin, G. R. and Farnan, I. (2006) 89Y Magic-Angle Spinning NMR of Y2Ti2-xSnxO7 Pyrochlores. Journal of Physical Chemistry B, 110 (21). 10358 -10364. DOI https://doi.org/10.1021/jp060844q
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Abstract
The yttrium local environment in the series of pyrochlores Y2Ti2-xSnxO7 was studied using 89Y NMR. Oxides with the pyrochlore structure exhibit a range of interesting physical and chemical properties, resulting in many technological applications, including the encapsulation of lanthanide- and actinide-bearing radioactive waste. The use of the nonradioactive Y3+ cation provides a sensitive probe for any changes in the local structure and ordering with solid solution composition, through 89Y (I = 1/2) NMR. We confirm that a single pyrochlore phase is formed over the entire compositional range, with Y found only on the eight-coordinated A site. A significant (15 ppm) chemical shift is observed for each Sn substituted into the Y second neighbor coordination environment. The spectral signal intensities of the possible combinations of Sn/Ti neighbors match those predicted statistically assuming a random distribution of Sn4+/Ti4+ on the six-coordinated pyrochlore B site.
Item Type: | Article |
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Uncontrolled Keywords: | 2006 AREP 2006 P IA51 |
Subjects: | 03 - Mineral Sciences |
Divisions: | 03 - Mineral Sciences |
Journal or Publication Title: | Journal of Physical Chemistry B |
Volume: | 110 |
Page Range: | 10358 -10364 |
Identification Number: | https://doi.org/10.1021/jp060844q |
Depositing User: | Sarah Humbert |
Date Deposited: | 16 Feb 2009 13:01 |
Last Modified: | 23 Jul 2013 10:01 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/123 |
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