| 拉曼光谱研究不同风化过程中七水硫酸镁晶体相转变行为 |
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| 作者姓名： | Wang F Zhang YH |
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| 作者单位： | 1. 河南理工大学物理化学学院化学系,河南,焦作,454000;北京理工大学物理学院化学物理研究所,北京,100081
2. 北京理工大学物理学院化学物理研究所,北京,100081 |
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| 基金项目： | 国家自然科学基金项目,河南理工大学博士基金项目 |
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| 摘 要： | 通过不同的相对湿度(relative humidity,RH)调节方法,获得了 MgSO4·7H2O 晶体不同风化过程中的原位共聚焦拉曼光谱,实现了不同阶段相转变细节的观测.在快速和慢速风化过程中,MgSO4·7H2O 晶体在 RH 3%时均转变生成 MgSO4·3H2O 晶体.而在潮解过程中,不同风化过程形成的 Mg...
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| 关 键 词： | MgSO4·7H2O 相转变 拉曼光谱 风化过程 |
Raman spectral investigations on the phase transition behaviors of MgSO4.7H2O crystals in different efflorescence processes |
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| Wang F,Zhang YH.Raman spectral investigations on the phase transition behaviors of MgSO4.7H2O crystals in different efflorescence processes[J].Spectroscopy and Spectral Analysis,2011,31(3):700-703. |
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| Authors: | Wang Feng Zhang Yun-hong |
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| Institution: | Chemistry Department, School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China. smallpeak@hpu.edu.cn |
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| Abstract: | In the present paper, the in situ confocal Raman spectra of MgSO4.7H2O crystal in different efflorescence processes were obtained through changing relative humidities in differernt ways. Thus, detailed investigation of phase transition of MgSO4.7H2O crystal was achieved. At 3% RH, the phase transition of MgSO4 crystal from MgSO4.7H2O to MgSO4.3H2O both occurred in the fast-efflorescence and slow-efflorescence processes. However, in the deliquescence process, distinct phase transition behaviors were found between the MgSO4.3H2O crystals which formed in different efflorescence processes, the MgSO4. 3H20 crystals formed in fast-efflorescence process transformed to MgSO4.6H2O crystals at 70% RH in the deliquescence process. On the contrary, the MgSO4.3H2O crystals formed in slow-efflorescence process deliquesced to supersaturated MgSO4 droplet. The studies indicated that there is a correlation between the phase transition behaviors and ways of changing RH for the different MgSO4 crystal hydrates. |
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