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Citation: Zhu Li-Xia, Yue Tao, Gao Shi-Yang, Xia Shu-Ping. Hydrothermal Crystal Growth of Mg(OH)₂•2MgSO₄•2H₂O[J]. Acta Physico-Chimica Sinica, ;2003, 19(03): 212-215. doi: 10.3866/PKU.WHXB20030305 shu

Hydrothermal Crystal Growth of Mg(OH)₂•2MgSO₄•2H₂O

1.
Xi’an Branch, Institute of Salt Lakes, Chinese Academy of Sciences, Xi’an 　710043; Institute of Applied Chemistry, Shaanxi Normal University, Xi’an　710062; Department of Chemistry, Lanzhou University, Lanzhou　730000

Received Date: 21 June 2002
Available Online: 15 March 2003

The hydrothermal reaction processes of MgSO4-NaOH-H2O system with the same raw materials concentration for different reaction time at 160 ℃ have been studied. There are two magnesium oxysulfate compounds obtained by hydrothermal reaction, namely 5Mg(OH)2•MgSO4•2H2O(MOS) whisker and Mg(OH)2•2MgSO4•2H2O crystal. The compounds were characterized by chemical analysis, XRD, FT-IR and SEM. The 5Mg(OH)2•MgSO4•2H2O whisker is a metastable phase in MgSO4-NaOH-H2O system at 160 ℃,whereas the Mg(OH)2•2MgSO4•2H2O crystal is the stable phase.
- Magnesium oxysulfate;Crystal growth;Hydrothermal synthesis;　Metastable phase;Stable phase
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Hydrothermal Crystal Growth of Mg(OH)2•2MgSO4•2H2O

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通讯作者: 陈斌, bchen63@163.com

Hydrothermal Crystal Growth of Mg(OH)₂•2MgSO₄•2H₂O