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四元体系KCl-ZnCl₂-HCl（～10.61%）-H₂O（298.15K）的相平衡及其固相化合物

Study on Phase Diagram of KCl ZnCl2-11%HCl H2O Systemat 25℃ and its Solid Phase Compounds

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【Author】 WANG Hui1,2 GAO Shi Yang*,1 ZHANG Hao Yong2 RENG Yan Wei2 RAN Xin Quan2(1Chemistry Engineering Institute, Lanzhou university, Lanzhou 730000)(2Chemistry Department of Northwest University, Xi’an 710069)

【机构】兰州大学化学化工学院；西北大学化学系；西北大学化学系兰州730000；西安710069；兰州730000；西安710069；

【Abstract】 The equilibrium solubility of KCl ZnCl2 HCl(11%) H2O(25℃) quaternary system at 25℃ was determined and the phase diagram was constructed. This system is complicated with two new compounds K2ZnCl4·H2O (2∶1 type) and K5Zn4Cl13·3H2O (5∶4 type) which have been obtained from the system and have been characterized by XRD, TG DTG. The result shows that compound K5Zn4Cl13·3H2O of 5∶4 type is the new one which have not been reported before. For compound K2ZnCl4·H2O parameter of unit cell is a=11.976?, b=9.066?, c=7.015?, and it belong to orthogonal crystalline system. The result of TG DTG shows that compounds K2ZnCl4·H2O and K5Zn4Cl13·3H2O will dehydrate at 400℃ and 670℃, respectively.更多还原

【关键词】四元体系；相平衡；氯化钾；二氯化锌；
【Key words】 quaternary system phase equilibrium potassium chloride zinc chloride；

【基金】国家自然科学基金资助项目(No.29371023)。