Experimental estimation of molecular structure of the water-rock interface under high-temperature and high-pressure conditions revealed by in situ IR and Raman spectroscopy
In order to investigate effects of molecular behavior of interfacial water on a rock surface at high temperature and pressure conditions, a high temperature-pressure cell was developed to measure infrared (IR)and Raman spectra. As a result of IR spectroscopic measurements, a continuous shift of the OH vibration mode was obtained from ambient to hydrothermal conditions. Compared with the result of IR properties of water on a metal, IR properties of water on a quartz surface exhibit different trends: the peak position shifted to higher wavenmber with increasing temperature and slightly shifted with pressure. The IR property of water was changed by environmental conditions such as temperature, pressure and substrate. We considered a possible structure of water molecules on a quartz surface. Interfacial water molecules interacted via hydrogen bonding with surface silanol molecules of quartz. This water-quartz interaction might influence water structuring on the quartz surface.
J.Abe, N.Hirano N.Tsuchiya
Graduate School of Environmental Studies, Tohoku University, Aoba, Aramaki, Sendai, Japan
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
49-52
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）