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

布里渊散射法研究稠密 H_2O 冰中 VI、VII 和 VIII 相的高压弹性特性

• 批准号: 07454062
• 负责人: SHIMIZU Hiroyasu
• 金额: $ 4.48万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07454062/
• 关键词: Ice; High-Pressure Phase; Brillouin Scattering; Sound Velocity; Elastic Constant

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.

在300 K和1.05 ~ 2.1GPa压力范围内，测定了H_2O冰和D_2O冰在任意方向的声速、折射率、绝热弹性常数和绝热体积模量。在1.23GPa压力下，H_2O冰VI的弹性常数典型值为C_<11>=32.8，C_<12>=11.8，C_<13>=14.7，C_<33>=27.8，C_<44>=6.3和C_<66>= <11><12><44>5.9GPa;折射率和弹性常数表明在所观察的压力范围内H_2O和D_2O之间没有区别。在2.1GPa下，冰的VI*VII相变时，声速、折射率和弹性常数都发生了剧烈的变化，而绝热体积模量几乎是连续变化的，这很可能与VI和VII冰的自包合结构和势函数的共同特征有关。

项目成果

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)

H. Shimizu 等人：“稠密 H_2O 和 D_2O 中冰的 VI 和 VII 相的高压弹性特性”Phys。

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)

SHIMIZU,H.NABETANI,T.NISHIBA,T.SASAKI,S.：“稠密 H_2O 和 D_2O 中冰的 VI 和 VII 相的高压弹性特性” Phys。

H.Shimizu et al.: "High-pressure phase transitions of solid H_2S probed by Fourier-transform infrared spectroscopy" Phys.Rev.B. 55(3月1日号). (1997)

H.Shimizu 等人：“通过傅里叶变换红外光谱探测固体 H_2S 的高压相变”Phys.Rev.B.（1997 年 3 月 1 日）。

佐々木重雄,他: "高圧氷VII相の弾性的性質" 高圧力の科学と技術. 4. 208-214 (1995)

Shigeo Sasaki 等人：“高压冰 VII 相的弹性特性”高压科学与技术 4. 208-214 (1995)。

H. Shimizu: "Elastic properties of dense H_2O-ices studied by Brillouin spectroscopy" Physica B. 219, 220. 559-561 (1996)

H. Shimizu：“通过布里渊光谱研究的致密 H_2O-冰的弹性特性”Physica B. 219, 220. 559-561 (1996)