Feasibility of in situ neutron diffraction studies of non-crystalline silicates up to pressures of 25 GPa

WILDING, Martin, GUTHRIE, Malcolm, BULL, Craig L., TUCKER, Matt G. and MCMILLAN, Paul F. (2008). Feasibility of in situ neutron diffraction studies of non-crystalline silicates up to pressures of 25 GPa. Journal of Physics: Condensed Matter, 20 (24), p. 244122.

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Abstract

There is an increasing interest in the structural modifications found in liquids and amorphous systems as a function of pressure. Neutron diffraction is a key technique for determining these structures, but its application in high pressure studies remains in its infancy. Recent developments now permit in situ neutron scattering studies of amorphous materials to very high pressure conditions. Here we present new data for MgO–SiO2 and SiO2 glasses collected at up to 8.6 and 24 GPa respectively, using two distinct high pressure anvil geometries. The data collected on the MgO–SiO2 system appear to be reliable, and suggest strong changes in the chemical ordering. In contrast, the higher pressure SiO2 data highlight significant difficulties in performing appropriate corrections for pressure-dependent background and attenuation effects. These challenges are discussed, and future improvements to the technique are proposed.

Item Type:	Article
Additional Information:	European-Science-Foundation Exploratory Workshop on Glassy Liquids Under Pressure, Ustron, POLAND, OCT 10-12, 2007
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Materials and Engineering Research Institute > Engineering Research
Departments - Does NOT include content added after October 2018:	Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
Identification Number:	https://doi.org/10.1088/0953-8984/20/24/244122
Page Range:	p. 244122
Depositing User:	Martin Wilding
Date Deposited:	03 Jul 2018 13:40
Last Modified:	18 Mar 2021 11:45
URI:	https://shura.shu.ac.uk/id/eprint/21496

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