| 石膏的高压原位Raman光谱和相变研究 |
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| 引用本文： | 马艳平,李芳菲.石膏的高压原位Raman光谱和相变研究[J].高压物理学报,2012,26(3):357-360. |
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| 作者姓名： | 马艳平 李芳菲 |
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| 作者单位： | 海南优势资源化工材料应用技术教育部重点实验室;硅锆钛资源综合开发与利用海南省重点实验室;海南大学材料与化工学院;吉林大学超硬材料国家重点实验室 |
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| 摘 要： | 利用金刚石对顶砧（DAC）高压装置产生高压，在0~35 GPa压力范围，对石膏（Gypsum，CaSO4·2H2O）晶体进行了高压原位Raman光谱研究。根据高压Raman光谱的实验数据，给出了石膏晶体Raman振动频率与压力的依赖关系；在4.5 GPa附近，在对称性伸缩振动范围，发现新的Raman峰1 012 cm-1出现，这个峰的强度随压力升高逐渐增强，据此断定在4.5 GPa 附近，石膏晶体发生了压力导致的结构相变。
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| 关 键 词： | 石膏 高压Raman光谱 相变 金刚石对顶砧（DAC） |
In-situ Raman Study and Phase Transition of Gypsum under High Pressure |
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| MA Yan-Ping,LI Fang-Fei.In-situ Raman Study and Phase Transition of Gypsum under High Pressure[J].Chinese Journal of High Pressure Physics,2012,26(3):357-360. |
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| Authors: | MA Yan-Ping LI Fang-Fei |
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| Institution: | 1.Key Laboratory of Ministry of Education for Application Technology of Chemical Materials in Hainan Superior Resources,Haikou 570228,China; 2.Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources,Haikou 570228,China; 3.Hainan University Materials and Chemical Engineering,Haikou 570228,China; 4.State Key Laboratory of Superhard Materials, Jilin University,Changchun 130012,China) |
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| Abstract: | In-situ high-pressure Raman study of the gypsum was carried out from 0 to 35 GPa with a diamond anvil cell(DAC).The authors determined the pressure dependences of the Raman bands of gypsum.A new Raman peak 1 012 cm-1 in the stretching vibration of range is found at pressure of about 4.5 GPa,and its intensity is shown to strengthen with increasing pressure.So we can determine the occurrence of pressure-induced phase transition near 4.5 GPa. |
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| Keywords: | gypsum high-pressure Raman spectroscopy phase transition diamond anvil cell(DAC) |
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