High pressure x-ray diffraction measurements on Mg2SiO4 glass

C. J. Benmore; E. Soignard; M. Guthrie; S. A. Amin; J. K. R. Weber; K. McKiernan; M. C. Wilding; J. L. Yarger

doi:10.1016/j.jnoncrysol.2010.12.064

High pressure x-ray diffraction measurements on Mg2SiO4 glass

C. J. Benmore^*, E. Soignard, M. Guthrie, S. A. Amin, J. K. R. Weber, K. McKiernan, M. C. Wilding, J. L. Yarger

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

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 similar 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. (C) 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	2632-2636
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	357
Issue number	14
Early online date	10 Feb 2011
DOIs	https://doi.org/10.1016/j.jnoncrysol.2010.12.064
Publication status	Published - 01 Jul 2011
Event	11th International Conference on the Structure of Non-Crystalline Materials (NCM 11) - Paris, France Duration: 28 Jun 2010 → 02 Jul 2010

Keywords

SCATTERING
Equation of state
High pressure
DISCONTINUITY
MELT
X-ray diffraction
LIQUID
FORSTERITE MG2SIO4
MANTLE
ATOP
MOLECULAR-DYNAMICS
Silicate glass
Glass structure

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@article{a1c998f06fcb4e8ea82ffe43ca251e12,

title = "High pressure x-ray diffraction measurements on Mg2SiO4 glass",

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 similar 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. (C) 2011 Elsevier B.V. All rights reserved.",

keywords = "SCATTERING, Equation of state, High pressure, DISCONTINUITY, MELT, X-ray diffraction, LIQUID, FORSTERITE MG2SIO4, MANTLE, ATOP, MOLECULAR-DYNAMICS, Silicate glass, Glass structure",

author = "Benmore, {C. J.} and E. Soignard and M. Guthrie and Amin, {S. A.} and Weber, {J. K. R.} and K. McKiernan and Wilding, {M. C.} and Yarger, {J. L.}",

note = "Benmore, C. J., Soignard, E., Guthrie, M., Amin, S. A., Weber, J. K. R., McKiernan, K., Wilding, M. C., Yarger, J. L. (2011). High pressure x-ray diffraction measurements on Mg2SiO4 glass. Journal Of Non-Crystalline Solids, 357 (14), 2632-2636.; 11th International Conference on the Structure of Non-Crystalline Materials (NCM 11) ; Conference date: 28-06-2010 Through 02-07-2010",

year = "2011",

month = jul,

day = "1",

doi = "10.1016/j.jnoncrysol.2010.12.064",

language = "English",

volume = "357",

pages = "2632--2636",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier",

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TY - JOUR

T1 - High pressure x-ray diffraction measurements on Mg2SiO4 glass

AU - Benmore, C. J.

AU - Soignard, E.

AU - Guthrie, M.

AU - Amin, S. A.

AU - Weber, J. K. R.

AU - McKiernan, K.

AU - Wilding, M. C.

AU - Yarger, J. L.

N1 - Benmore, C. J., Soignard, E., Guthrie, M., Amin, S. A., Weber, J. K. R., McKiernan, K., Wilding, M. C., Yarger, J. L. (2011). High pressure x-ray diffraction measurements on Mg2SiO4 glass. Journal Of Non-Crystalline Solids, 357 (14), 2632-2636.

PY - 2011/7/1

Y1 - 2011/7/1

N2 - 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 similar 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. (C) 2011 Elsevier B.V. All rights reserved.

AB - 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 similar 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. (C) 2011 Elsevier B.V. All rights reserved.

KW - SCATTERING

KW - Equation of state

KW - High pressure

KW - DISCONTINUITY

KW - MELT

KW - X-ray diffraction

KW - LIQUID

KW - FORSTERITE MG2SIO4

KW - MANTLE

KW - ATOP

KW - MOLECULAR-DYNAMICS

KW - Silicate glass

KW - Glass structure

UR - http://hdl.handle.net/2160/8767

U2 - 10.1016/j.jnoncrysol.2010.12.064

DO - 10.1016/j.jnoncrysol.2010.12.064

M3 - Article

SN - 0022-3093

VL - 357

SP - 2632

EP - 2636

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

IS - 14

T2 - 11th International Conference on the Structure of Non-Crystalline Materials (NCM 11)

Y2 - 28 June 2010 through 2 July 2010

ER -

High pressure x-ray diffraction measurements on Mg2SiO4 glass

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Keywords

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