Infrared absorption study of Fermi resonance and hydrogen-bond symmetrization of ice up to 141 GPa

作     者：M. Song H. Yamawaki H. Fujihisa M. Sakashita K. Aoki 

作者机构：Core Research for Evolutional Science and Technology Japan Science and Technology Corporation Kawaguchi Saitama 332-0012 Japan 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：1999年第60卷第18期

页      面：12644-12644页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

摘      要：The infrared absorption spectra of H2O and D2O ices were measured with a diamond-anvil cell up to 141 GPa at 298 K. The high-pressure spectra corrected for diamond absorption provided the substantial absorption profile of ices over the whole pressure range measured. A sequence of pressure-induced Fermi resonance was observed between the softening stretch mode and the combinations of rotational and bending modes below 55 GPa as reported previously. One rotational mode showed an abrupt increase in the peak frequency at 58±3GPa in H2O ice and 68±3GPa in D2O ice. This can be attributed to a transition from ice VII to proton-tunneling-disordered ice VII. A further transition into proton-disordered ice X was inferred from the spectral change to occur roughly at 65–75 GPa for H2O and 80–90 GPa for D2O.