Compressibility of hydrogen in Ni and Re hosts at pressures to 123 GPa

Stanislav P. Besedin, Andrew P. Jephcoat, Michael Hanfland

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    Ni-H and Re-H binary systems have been studied at room temperature by X-ray diffraction in a diamond-anvil cell. The formation of the hydrides NiH and ReH0.4 with no change in the types of the host metal lattices was observed through the expansion of the host lattices. No structure changes were observed in the metal sub-lattice of either hydride under increasing pressure and the equations of state have been obtained to 123 GPa. The difference in the partial hydrogen volume as a function of pressure between the Ni-H and Re-H systems can be understood with reference to the behaviour of conduction electrons. The pressure dependence of the partial hydrogen volume in these hydrides supports the hypothesis of the apparent common-volume behaviour of hydrogen in a metallic environment.

    Original languageEnglish
    Pages (from-to)225-234
    Number of pages10
    JournalHigh Pressure Research
    Issue number3-6
    Publication statusPublished - 2000


    • Diamond-anvil cell
    • Equation of state
    • High pressure
    • Metal hydrides

    ASJC Scopus subject areas

    • Condensed Matter Physics


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