Characterization of oxygen dynamics in ZrW₂O₈

Hampson, M.R.; Evans, J.S.O.; Hodgkinson, P.

Abstract

The dynamics of oxygen motion in ZrW2O8 have been characterized using O-17 solid-state NMR. Rates of dynamic exchange have been extracted from magnetization transfer experiments over a temperature range of 40 to 226 degrees C, and distinct values for the associated activation barrier have been observed on either side of the order/disorder phase transition at similar to 175 degrees C. A detailed model for the dynamical process is proposed, which reconciles the observation of continuing oxygen dynamics in the low-temperature phase with the static order implied by earlier X-ray diffraction studies.

Citation

Hampson, M., Evans, J., & Hodgkinson, P. (2005). Characterization of oxygen dynamics in ZrW₂O₈. Journal of the American Chemical Society, 127(43), 15175-15181. https://doi.org/10.1021/ja054063z

• Journal Article Type: Article
• Publication Date: 2005-11
• Deposit Date: Apr 25, 2007
• Journal: Journal of the American Chemical Society
• Print ISSN: 0002-7863
• Electronic ISSN: 1520-5126
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 127
• Issue: 43
• Pages: 15175-15181
• DOI: https://doi.org/10.1021/ja054063z
• Public URL: https://durham-repository.worktribe.com/output/1570414