常温高压下石膏在水中溶解及相变现象的研究

王世霞; 郑海飞

doi:10.11858/gywlxb.2008.04.016

常温高压下石膏在水中溶解及相变现象的研究

doi: 10.11858/gywlxb.2008.04.016

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

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通讯作者:
郑海飞

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出版历程
- 收稿日期: 2007-10-10
- 修回日期: 2008-01-05
- 发布日期: 2008-12-05

The Research on Dissolvability and Phase Transition of Gypsum at High Pressure and Ambient Temperature

Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earch and Space Science, Peking University, Beijing, 100871, China

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Corresponding author: ZHENG Hai-Fei

摘要

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。
- 高压 /
- 石膏 /
- 溶解 /
- 相变
Abstract: The Raman spectra of gypsum during the pressure of 200~1 100 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 applies that geological disasters will happen because of dissolvability and phase transition of minerals in the inner of earth.
- high pressure /
- gypsum /
- dissolvability /
- phase transition

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参考文献(25)

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