100万気圧の超高圧下で対称氷をつくる [in Japanese] National Institute of Materials and Chemical Research [in Japanese]
Access this Article
Search this Article
The transition to a symmetric ice has been observed at about 60 GPa by infrared absorption spectroscopy. The hydrogen-bond symmetrization, which is accompanied by a subsequent deformation of the hydrogen-bond potential from a double to single minimum shape, is well recognized as a turn in the pressure dependence of the OH stretching frequencies from a decrease to increase at the transition point. In the intermediate state, the stretching vibrational modes is shown to form a continuous energy band as a result of quantum-mechanical manybody effects. This effect leads to an interference phenomenum between the proton-related vibrational states.
X-RAYS 39(3), 248-253, 1997-06-28
The Crystallographic Society of Japan