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.
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)|
|Uncontrolled Keywords:||09AREP; IA58;|
|Subjects:||03 - Mineral Sciences|
|Divisions:||03 - Mineral Sciences|
|Page Range:||pp. 153-160|
|Depositing User:||Sarah Humbert|
|Date Deposited:||10 Sep 2009 08:10|
|Last Modified:||23 Jul 2013 09:55|
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