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Structural description of pressure-induced amorphization in ZrW2O8. | LitMetric

Structural description of pressure-induced amorphization in ZrW2O8.

Phys Rev Lett

ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.

Published: June 2007

AI Article Synopsis

Article Abstract

ZrW2O8 undergoes a high-pressure amorphization transition above 1.5 GPa to a phase which is recoverable to ambient conditions. Reverse Monte Carlo modeling of neutron and x-ray total scattering data from ZrW2O8 recovered from approximately 4 GPa shows that the large increase in density on pressurizing ZrW2O8 is accommodated within the structure by increased bonding between the WO4 tetrahedra. This increases the tungsten coordination; changes to the ZrO6 octahedral environment are not required. This densified crystal-based model, which contains significant local disorder within a distorted periodic structure, is also in reasonable agreement with x-ray and neutron total scattering data measured in situ at high pressure.

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Source
http://dx.doi.org/10.1103/PhysRevLett.98.225501DOI Listing

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