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Citation: Zhou Jian-Guo, Yan Chang-Ling, Lu Yan, Gao Shi-Yang, Xia Shu-Ping. Phase Transformation of Supersaturated Solution of M •3B₂O₃-H₂O under Hydrothermal Condition[J]. Acta Physico-Chimica Sinica, ;2004, 20(03): 306-308. doi: 10.3866/PKU.WHXB20040318 shu

Phase Transformation of Supersaturated Solution of M •3B₂O₃-H₂O under Hydrothermal Condition

1.
College of Chemistry and Environmental Science, Henan Normal University, Xinxiang　453002;Department of Chemistry, Lanzhou University　730000;Xi’an Branch, Institute of Salt Lake, Chinese Academy of Sciences, Xi’an　710043

Received Date: 9 July 2003
Available Online: 15 March 2004

Supersaturated solution of M •3B2O3-H2O was prepared and kept under hydrothermal condition at 120 ℃.The solid phases separated from M •3B2O3-H2O supersaturated solution were identified by means of chemical analysis, XRD and IR. The process was a phase transformation of Mg-borates. Two amorphous intermediate-products are 2M •3B2O3•5H2O and M •B2O3•3H2O and the final product is the crystalling 2M •B2O3•H2O.The mechanism of phase transformation was proposed and the function of MgSO4 in the supersaturated solution of M •3B2O3-18％MgSO4-H2O was discussed.
- Hydrothermal condition;Supersaturated solution;Mg-borate;Phase transformation
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Phase Transformation of Supersaturated Solution of M •3B2O3-H2O under Hydrothermal Condition

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通讯作者: 陈斌, bchen63@163.com

Phase Transformation of Supersaturated Solution of M •3B₂O₃-H₂O under Hydrothermal Condition