Hampson, M. R. and Evans, J. S. O. and Hodgkinson, P. (2005) 'Characterization of oxygen dynamics in ZrW2O8.', Journal of the American Chemical Society., 127 (43). pp. 15175-15181.
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.
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|Publisher Web site:||http://dx.doi.org/10.1021/ja054063z|
|Record Created:||25 Apr 2007|
|Last Modified:||08 Apr 2009 16:30|
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