X 線回折による氷およびクラスレート水和物の構造に関する最近の研究

抄録

Recent studies on crystallographic structures of ice and clathrate hydrates are briefly reviewed. It is shown that precise structure analysis by single crystal X-ray diffractometry is a powerful tool to clarify the electron density distribution relating to the hydrogen bonding in ice I_h, and also the distribution of guest molecules encaged in the clathrate structure. Local ordering of proton arrangements in the disordered system of ice is discussed for better understanding of the diffuse scattering observed in ice I_h. In addition, very recent data of neutron spectroscopy and a new concept of different strength of hydrogen bonding introduced in order to interpret those data are briefly explained also.