【摘要】 利用金刚石压腔装置测量了高压下石膏中S—O键的4种振动模式和结晶水中羟基伸缩振动Raman位移,研究结果表明:在常温(25℃)和100~800 MPa压力范围内,石膏中S—O键的Raman谱峰的位移随压力的增加而向高波数方向移动,结晶水中羟基的两个伸缩谱峰随着压力的增加而向低波数方向移动,同时得到了各个谱峰与压力之间的关系式,其中结晶水中羟基的两个伸缩谱峰的dν/dp值有较大不同,是由于结晶水中含有两个强度不同的氢键所致。更多还原

【Abstract】 This paper measures the Raman peak displacements of the four vibration modes of S—O bonding and the hydroxyl-stretching vibration modes in the gypsum at high pressures using diamond anvil cell.The experimental results show that at the temperature of 25℃ and the pressure of 100～(800MPa) the Raman peak positions of the S—O bonding in the gysum shift to high wave numbers with the increase of the system pressure,while the Raman peak positions of hydroxyl-stretching vibrations shift to low wave numbers with the increase of the system pressure.The relations between the(Raman) peak positions and system pressure were obtained,and the two dν/dp values of hydroxyl-stretching vibrations show a great difference because of different intensity of the hydrogen bonding.更多还原