Kroeker, S. and Farnan, I. and Schuller, S. and Advocat, T. (2009) 95Mo NMR Study of Crystallization in Model Nuclear Waste Glasses. In: Materials Research Society Symposium Proceedings.
Full text not available from this repository.Abstract
95Mo magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy is surprisingly sensitive to the local environment of tetrahedral molybdate species. A series of compounds related to expected crystallization products in nuclear waste glasses are probed to calibrate their spectral characteristics. Glasses formed with fast and slow quenching show a glassy peak corresponding to tetrahedral molybdate species. With slow quenching, a prominent sharp peak is observed, representing crystallinity. In sodium-borosilicate glasses with 2.5 mol% MoO3, the sharp peak corresponds to pure crystalline sodium molybdate. Cesium-sodium and lithium-sodium borosilicate glasses with Mo show crystalline peaks as well, and suggest that NMR may potentially be used to characterize mixed-cation molydates and more complex phase assemblages. While precise quantification of Mo in different phases is likely to be time-consuming, reasonable estimates can be obtained routinely, making 95Mo MAS NMR a useful tool for investigating phase separation and crystallization in model nuclear waste materials.
Item Type: | Conference or Workshop Item (Paper) |
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Uncontrolled Keywords: | 09AREP; IA58; |
Subjects: | 03 - Mineral Sciences |
Divisions: | 03 - Mineral Sciences |
Volume: | 1124 |
Page Range: | pp. 153-160 |
Identification Number: | https://doi.org/10.1557/PROC-1124-Q03-06 |
Depositing User: | Sarah Humbert |
Date Deposited: | 10 Sep 2009 08:10 |
Last Modified: | 23 Jul 2013 09:55 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/1170 |
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