Structure and hydration of mineral crystal surfaces

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[Infrared absorption spectra] In situ infrared spectra under temperatures and humidity ware obtained by ATR-FTIR methods of 0ne and five reflections. Under stress using weights, the spectra of water pinched between ATR-diamond crystal and mineral surface were measured as function of weight.[X-ray diffraction] X-ray diffraction patterns of adsorbed water and crystal surface were obtain aθ-θtype goniometer with constant low angle incident x-ray beam. We also performed refractivity measurements at KEK-PF to obtain atom distributions in water and alkali halide aqueous solutions near crystal surfaces.[Molecular simulations] Molecular dynamics simulations of corresponding systems with the experiments above were carried out using our inter atomic potential models and the MD code, MXDORTO/MXDTRICL.We are performing combined analyses od experimental results and computations.