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Diffraction study of pressure-amorphized ZrW2O8 using in situ and recovered samples

DOI: 10.1103/PhysRevB.83.064109 DOI Help

Authors: David Keen (Rutherford Appleton Laboratory) , Andrew Goodwin (University of Oxford) , Matthew Tucker (ISIS Facility) , Joe Hriljac (University of Birmingham) , Thomas Bennett (University of Cambridge) , Martin Dove (University of Cambridge) , Annette Kleppe (Diamond Light Source) , Andrew Jephcoat (Diamond Light Source) , Michela Brunelli (ESRF)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 83 (6) , PAGES 064109

State: Published (Approved)
Published: February 2011

Abstract: High-energy x-ray diffraction data from a series of amorphous ZrW2O8 samples, recovered from a number of different pressures, have been measured and compared with similar data collected from a sample contained within a diamond anvil cell and measured in situ at high pressure. Samples at lower pressures are a mix of crystalline and amorphous phases, whereas those above 7 GPa (both recovered and in situ) appear to be completely amorphous. Although there are only very small changes in the diffraction data from the pure phase samples recovered from different pressures, larger changes are observed in situ as a function of pressure. However, the same structural model can be used to describe all data, albeit using different densities. This strongly suggests that the amorphous phase is undergoing nonreconstructive compression in this pressure range, without fundamental modification of the underlying topology.

Subject Areas: Environment

Instruments: I15-Extreme Conditions

Other Facilities: European Synchrotron Radiation Facility

Added On: 02/03/2011 08:35

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