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常温高压下石膏在水中溶解及相变现象的研究
引用本文:王世霞,郑海飞.常温高压下石膏在水中溶解及相变现象的研究[J].高压物理学报,2008,22(4).
作者姓名:王世霞  郑海飞
作者单位:北京大学地球与空间科学学院造山带与地壳演化教育部重点实验室,北京,100871
基金项目:国家自然科学基金项目(40640420060)
摘    要: 研究常温下200~1 100 MPa压力范围内石膏的Raman光谱,原位观测了随压力升高,石膏在水中的溶解现象,其过程中伴随着石膏的相变。结果表明:压力小于407 MPa时,石膏的形态无明显变化;随着压力的升高,石膏开始溶解,溶解至一定程度,石膏发生了向半水石膏转化的相变;相变完成后,半水石膏继续溶解至消失。石膏这一溶解相变过程表明在地球内部与压力相应的深部区域内,也可能会发生矿物的溶解相变。

关 键 词:高压  石膏  溶解  相变
收稿时间:2007-10-10;

The Research on Dissolvability and Phase Transition of Gypsum at High Pressure and Ambient Temperature
WANG Shi-Xia,ZHENG Hai-Fei.The Research on Dissolvability and Phase Transition of Gypsum at High Pressure and Ambient Temperature[J].Chinese Journal of High Pressure Physics,2008,22(4).
Authors:WANG Shi-Xia  ZHENG Hai-Fei
Institution:Key Laboratory of Orogenic Belts and Crustal Evolution;Ministry of Education;School of Earth and Space Science;Peking University;Beijing 100871;China
Abstract:The Raman spectra of gypsum in the pressure range of 200~1100 MPa is studied at ambient temperature,and the dissolvability and phase transition of gypsum are observed.It shows that gypsum is stable at the pressure less than 407 MPa;and then gypsum begins to dissolve with the increasing pressure.Gypsum stops dissolving and phase transition happens(gypsum-bassanite) to some degree.After phase transition,bassanite disappears with the rising pressure.It implies that geological disasters will happen because of d...
Keywords:high pressure  gypsum  dissolvability  phase transition  
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