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1996 Fiscal Year Final Research Report Summary

High-pressure elastic properties of VI, VII and VIII phases in dense H_2O ice by Brillouin Scattering

Research Project

Project/Area Number 07454062
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionGifu University

Principal Investigator

SHIMIZU Hiroyasu  Gifu University, Dept. of Electronics, Professor, 工学部, 教授 (80023258)

Co-Investigator(Kenkyū-buntansha) SASAKI Shigeo  Gifu University, Dept. of Electronics, Assoc. Prof., 工学部, 助教授 (30196159)
Project Period (FY) 1995 – 1996
KeywordsIce / High-Pressure Phase / Brillouin Scattering / Sound Velocity / Elastic Constant
Research Abstract

We have determined acoustic velocities in any direction, refractive index, adiabatic elastic constants, and adiabatic bulk modulus of H_2O and D_2O ices at 300K and at pressures between 1.05 and 2.1 GPa for tetragonal ice VI and above pressures up to 8 GPa for cubic ice VII.Typical values of elastic constants for H_2O ice VI are C_<11>=32.8, C_<12>=11.8, C_<13>=14.7, C_<33>=27.8, C_<44>=6.3, and C_<66>=5.9 GPa at the pressure of 1.23 GPa Moreover, for H_2O ice VII the values of 3 elastic constants are C_<11>=57, C_<12>=31, and C_<44>=32, GPa at P=4.7 GPa. Refractive index and elastic constants show no distinction between H_2O and D_2O over the observed pressure ranges. At ice VI*VII transition at 2.1 GPa, acoustic velocities, refractive index, and elastic constants present drastic change, but the adiabatic bulk modulus shows almost continuous change which is most likely to relate the common features of the selfclathrate structure and the potential function in both VI and VII ices.
These results studied by Brillouin Spectroscopy are noticeable in the high-pressure world.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] H. Shimizu et al.: "High-pressure elastic properties of the VI and VII phase of ice in dense H_2O and D_2O" Phys. Rev. B. 53. 6107-6110 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H. Shimizu: "Elastic properties of dense H_2O-ices studied by Brillouin spectroscopy" Physica B. 219, 220. 559-561 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H. Shimizu et al.: "High-pressure phase of solid hydrogen sulfide" Phys. Rev. B (Rapid). 54. R717-719 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 清水宏晏ら: "室温高圧氷の弾性的性質" 日本物理学会誌. 52. 111-114 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H. Shimizu et al.: "High-pressure phase transitions of solid H_2S probed by Fourier-transform infrared spectroscopy" Phys. Rev. B. 55. 5538-5541 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SHIMIZU,H.NABETANI,T.NISHIBA,T.SASAKI,S.: "High-pressure elastic properties of the VI and VII phase of ice in dense H_2O and D_2O" Phys. Rev. B. 53(No.10). 6107-6110 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SHIMIZU,H.: "Elastic properties of dense H_2O-ices studied by Brillouin spectroscopy" Physico, B. 219+220(No.1-4). 559-561 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] ENDO,S.HONDA,A.SASAKI,S.SHIMIZU,H.SHIMOMURA,O.KIKEGAWA,T.: "High-pressure phase of solid hydrogen sulfide" Phys. Rev. B. (Rapid) 54 (No.2). R717-719 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SHIMIZU,H.SASAKI,S.: "Elastic properties of high-pressure ice at room temperature" J.Phys.Soc.Jpn.52(in Japanese). 111-114 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SHIMIZU,H.USHIDA,T.SASAKI,S.SAKASHITA,M.YAMAWAKI,H.AOKI,K.: "High-pressure phase transitions of solid H_2S probed by Fourier-transform infrared spectroscopy" Phys.Rev.B. 55(No.10). 5538-5541 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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