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Microstructure of lead silicate melt under compression: insight from computer simulation

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  • Nguyen Van Hong

    (Hanoi University of Science and Technology)

  • Mai Thi Lan

    (Hanoi University of Science and Technology)

  • Hoang Viet Hung

    (Hanoi University of Science and Technology)

  • Luyen Thi San

    (Hanoi University of Science and Technology)

Abstract

The microstructure of lead silicate melt (Pb2SiO4) and its change under high pressure are investigated by molecular dynamics simulation. The models are constructed at temperature of 3000 K and in the 0–50 GPa pressure range. The microstructural correlate of pair radial distribution functions is clarified. Short range order (SRO) and intermediate range order (IRO) are investigated via topology analysis of SiOx units and SiOx-clusters. Microstructural analysis, cluster-analysis and visualization techniques are applied to clarify the characteristics of -Si-O- network structure. The local environment around Pb+2, Si+4 and O−2 ions, incorporation mechanism of Pb2+ cations into -Si-O- network, the microphase separation under compression have been clarified. Specially, the storage mechanism of hazardous metal ions (heavy metal ions in industrial and nuclear wastes) in silica-based multicomponent oxide systems is also discussed in detail. Graphical abstract

Suggested Citation

  • Nguyen Van Hong & Mai Thi Lan & Hoang Viet Hung & Luyen Thi San, 2019. "Microstructure of lead silicate melt under compression: insight from computer simulation," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 92(12), pages 1-14, December.
    • Handle: RePEc:spr:eurphb:v:92:y:2019:i:12:d:10.1140_epjb_e2019-100434-1
    DOI: 10.1140/epjb/e2019-100434-1
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    Keywords

    Solid State and Materials;

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