Melting of rare gas solids Ar, Kr, Xe at high pressures and fixed points in the P-T plane

Andrew P. Jephcoat, Stanislav P. Besedin

    Research output: Chapter in Book/Report/Conference proceedingChapter

    2 Citations (Scopus)

    Abstract

    We present melting temperatures determined at several pressures for solid argon, krypton, and xenon up to 47, 18, and 12 GPa respectively. At these pressures the observed melting temperatures rise to 2790±150 K for argon, 2175±150 K for krypton, and 2054±150 K for xenon. These data suggest that rare gas solids (RGS) melt at high temperatures relative to other classes of materials with increasing pressure. The argon melting temperatures are consistent with both empirical and theoretical predictions. Within experimental error, the melting curves for Ar and Kr are consistent with the Simon-Glatzel (SG) expression for the melting curve obtained at lower pressures. For xenon, the data indicate that melting occurs at lower temperatures than predicted by an SG relation based on melting data to 0.65 GPa, but above the melting curve expected from a corresponding-states scaling of the internally consistent melting curves of both Ne and Ar. In addition to the intersection of the argon and iron (Ar-Fe) melting curves in the range 42-47 GPa and 2750±150 K, the experiments suggest an intersection of the Kr-Fe melting curves near 23 GPa and 2300±150 K and of the Xe-Pt curves in the range 12-15 GPa and 2300±150 K.

    Original languageEnglish
    Title of host publicationProperties of Earth and Planetary Materials at High Pressure and Temperature, 1998
    EditorsMurli H. Manghnani, Takehiko Yagi
    PublisherBlackwell Publishing Ltd
    Pages287-296
    Number of pages10
    ISBN (Electronic)9781118664421
    ISBN (Print)9780875900834
    DOIs
    Publication statusPublished - 1997

    Publication series

    NameGeophysical Monograph Series
    Volume101
    ISSN (Print)0065-8448
    ISSN (Electronic)2328-8779

    ASJC Scopus subject areas

    • Geophysics

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