High pressure x-ray diffraction measurements on Mg2SiO4 glass

BENMORE, C. J., SOIGNARD, E., GUTHRIE, M., AMIN, S. A., WEBER, J. K. R., MCKIERNAN, K., WILDING, Martin and YARGER, J. L. (2011). High pressure x-ray diffraction measurements on Mg2SiO4 glass. Journal of Non-Crystalline Solids, 357 (14), 2632-2636.

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Official URL: https://www.sciencedirect.com/science/article/pii/...
Link to published version:: https://doi.org/10.1016/j.jnoncrysol.2010.12.064
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    Abstract

    The structure factors of Mg2SiO4 glass have been measured using high energy x-ray diffraction up to pressures of 30.2 GPa, and the equation of state measured up to 12.8 GPa. The average Mg–O coordination numbers were extracted from the experimental pair distribution functions assuming two cases (i) there is no change in Si–O coordination number with pressure and (ii) the average Si–O coordination number increases the same as for pure SiO2 glass. Both analyses give similar results and show a gradual increase in the average Mg–O coordination number from 5.0 at ambient pressure to ~ 6.6(6) at 30.2 GPa. There is good qualitative agreement between the experimental structure and equation of state data for the glass compared to several recent molecular dynamics simulations carried out on liquid Mg2SiO4.

    Item Type: Article
    Additional Information: 11th International Conference on the Structure of Non-Crystalline Materials (NCM 11), Paris, FRANCE, JUN 28-JUL 02, 2010
    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/10.1016/j.jnoncrysol.2010.12.064
    Page Range: 2632-2636
    Depositing User: Martin Wilding
    Date Deposited: 03 Jul 2018 13:59
    Last Modified: 03 Jul 2018 13:59
    URI: http://shura.shu.ac.uk/id/eprint/21481

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