Raman Spectroscopic Study on the Fluid Effects in Dissolution and Phase Transition Mechanisms of Gypsum
WANG Shi-xia1, 2, ZHENG Hai-fei2*
1. Laboratory of Isotope Geology, MLR, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 2. Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, Peking University, Beijing 100871, China
Abstract：Raman spectroscopic studies on the process of dissolution and phase transition of gypsum in different fluids were taken. Gypsum took phase transition to be anhydrite in the range from 170 ℃ to 190 ℃ in pure water, and no more change happened with decreasing temperature to room temperature. Gypsum took phase transition to be anhydrite in the range from 170 ℃ to 190 ℃ too in Na2SO4 solution, but anhydrite can regain to be gypsum when temperature decreases to room temperature. The process of phase transition of gypsum in pure water is not reversible, but it happens in Na2SO4 solution. The study shows that fluid effects can influence the dissolution and phase transition mechanisms of minerals and cannot be ignored.
王世霞1, 2，郑海飞2*. 石膏溶解相变过程中流体效应的拉曼光谱研究[J]. 光谱学与光谱分析, 2012, 32(03): 673-675.
WANG Shi-xia1, 2, ZHENG Hai-fei2* . Raman Spectroscopic Study on the Fluid Effects in Dissolution and Phase Transition Mechanisms of Gypsum . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(03): 673-675.
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