氷VII相およびVIII相の体積弾性率と状態方程式 Bulk moduli and equations of state of ice VII and ice VIII

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Abstract

著者所属: 日本原子力研究開発機構(JAEA)

The compression behaviour of deuterated ice VII and VIII was investigated by high pressure neutron scattering in the pressure range 2-13.7 GPa between 93 K and 300 K. We establish equations-of-state which contain accurate values for the bulk moduli B{0, their pressure derivatives B'{0, as well as the ambient pressure volumina V{0. These equations-of-state hold over a large part of the stability domain of ice VII, by comparison with available X-ray data, and to at least {approx 13 GPa for ice VIII. They are indistinguishable at low pressures, but beyond {approx 7 GPa and at low temperatures ice VIII appears to become stiffer than expected. This might be related to an anomalous phonon hardening observed previously in ice VIII in this P/T range [D.D. Klug et al., Physical Review B, 70, 144113 (2004)].

Journal

  • Physical Review B

    Physical Review B 95(17), 174111\_1-174111\_7, 2017-05

    American Physical Society

Codes

  • NII Article ID (NAID)
    120006502074
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    2469-9950
  • Data Source
    IR 
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