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Characterization of oxygen dynamics in ZrW2O8.

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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Record Created:25 Apr 2007
Last Modified:08 Apr 2009 16:30

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