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Topological structural analysis and dynamical properties in MgSiO3 liquid under compression

Author

Listed:
  • Nguyen Yen

    (Duy Tan University
    Duy Tan University)

  • Emmanuel L. C. VI M. Plan

    (Vietnam National University)

  • Pham Huu Kien

    (Thai Nguyen University of Education)

  • Anh Tien Nguyen

    (Ho Chi Minh City University of Education)

  • Nguyen Hong

    (Hanoi University of Science and Technology)

  • Haidang Phan

    (Vietnam National University)

Abstract

In this paper, we report the changes in structural and dynamical properties of a MgSiO3 liquid under compression via molecular dynamics simulation. The short-range order is analyzed through the bond angles and bond lengths of the structural units, and the mean coordination number of both Si and Mg metals is found to increase with pressure. Intermediate-range order, characterized by the number of OTy links and of corner-, edge- and face-sharing bonds between two neighboring units, suggests the formation of Si–O- and Mg–O-rich regions in the magnesium silicate liquid. The self-diffusion and viscosity coefficients are then calculated to characterize the system dynamics and are found to be in good agreement with previous experiments and simulations. Most importantly, our result suggests a relationship between structural and dynamic heterogeneity of liquid magnesium silicates, particularly at high pressure. Graphical abstract

Suggested Citation

  • Nguyen Yen & Emmanuel L. C. VI M. Plan & Pham Huu Kien & Anh Tien Nguyen & Nguyen Hong & Haidang Phan, 2022. "Topological structural analysis and dynamical properties in MgSiO3 liquid under compression," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 95(4), pages 1-11, April.
    • Handle: RePEc:spr:eurphb:v:95:y:2022:i:4:d:10.1140_epjb_s10051-022-00313-0
    DOI: 10.1140/epjb/s10051-022-00313-0
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    1. Yanbin Wang & Tatsuya Sakamaki & Lawrie B. Skinner & Zhicheng Jing & Tony Yu & Yoshio Kono & Changyong Park & Guoyin Shen & Mark L. Rivers & Stephen R. Sutton, 2014. "Atomistic insight into viscosity and density of silicate melts under pressure," Nature Communications, Nature, vol. 5(1), pages 1-10, May.
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