Compression of ice to 210 gigapascals: Infrared evidence for a symmetric hydrogen-bonded phase

被引：272

作者：

Goncharov, AF ^{[1
]}

Struzhkin, VV ^{[1
]}

Somayazulu, MS ^{[1
]}

Hemley, RJ ^{[1
]}

Mao, HK ^{[1
]}

机构：

[1] CARNEGIE INST WASHINGTON,CTR HIGH PRESSURE RES,WASHINGTON,DC 20015

来源：

SCIENCE | 1996年 / 273卷 / 5272期

关键词：

D O I：

10.1126/science.273.5272.218

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Protonated and deuterated ices (H2O and D2O) compressed to a maximum pressure of 210 gigapascals at 85 to 300 kelvin exhibit a phase transition at 60 gigapascals in H2O ice (70 gigapascals in D2O ice) on the basis of their infrared reflectance spectra determined with synchrotron radiation. The transition is characterized by soft-mode behavior of the nu(3) O-H or O-D stretch below the transition, followed by a hardening (positive pressure shift) above it. This behavior is interpreted as the transformation of ice phase VII to a structure with symmetric hydrogen bonds. The spectroscopic features of the phase persisted to the maximum pressures (210 gigapascals) of the measurements,although changes in vibrational mode coupling were observed at 150 to 160 gigapascals.

引用

页码：218 / 220

页数：3

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