In-situ high-pressure powder X-ray diffraction study of zirconium phosphate

Jennifer E. Readman, Alistair Lennie, Joseph A. Hriljac*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The high-pressure structural chemistry of zirconium phosphate, Zr(HPO4)2·H2O, was studied using in-situ high-pressure diffraction and synchrotron radiation. The layered phosphate was studied under both hydrostatic and non-hydrostatic conditions and Rietveld refinement carried out on the resulting diffraction patterns. It was found that under hydrostatic conditions no uptake of additional water molecules from the pressure-transmitting medium occurred, contrary to what had previously been observed with some zeolite materials and a layered titanium phosphate. Under hydrostatic conditions the sample remained crystalline up to 10GPa, but under non-hydrostatic conditions the sample amorphized between 7.3 and 9.5GPa. The calculated bulk modulus, K 0 = 15.2GPa, showed the material to be very compressible with the weak linkages in the structure of the type Zr - O - P.

    Original languageEnglish
    Pages (from-to)510-516
    Number of pages7
    JournalActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials
    Volume70
    Issue number3
    Early online date31 May 2014
    DOIs
    Publication statusPublished - Jun 2014

    Keywords

    • equation of state
    • high pressure
    • layered phosphate
    • Rietveld refinement

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Metals and Alloys
    • Atomic and Molecular Physics, and Optics

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