四元体系LaCl_3-ZnCl_2-HCl(7%)-H_2O(25℃)和三元体系ZnCl_2-HCl-H_2O(25℃)相平衡的研究  

Study on Quaternary System LaCl_3-ZnCl_2-HCl(7%)-H_2O and Ternary System ZnCl_2-HCl-H_2O(25℃)

作　　者：乔占平[1] 卓立宏[1] 张书申[1] 王惠[2] 

机构地区：[1]南阳师范学院化学系,南阳473061 [2]西北大学化学系,西安710069

出　　处：《无机化学学报》2003年第3期303-306,共4页Chinese Journal of Inorganic Chemistry

基　　金：河南教育厅基金项目资助课题(No.2000150036)。

摘　　要：测定了四元体系LaCl3-ZnCl2-HCl(7%)-H2O(25℃)的稳定平衡的溶度数据,绘制了相应的溶度图。该体系是由5个固相区LaCl3·7H2O(原始盐)、3LaCl3·2ZnCl2·25H2O、LaCl3·2ZnCl2·11H2O、2LaCl3·7ZnCl2·23H2O和ZnCl2·H2O·0.5H2O组成的复杂体系。其中后4种固相化合物未见文献报道。对3LaCl3·2ZnCl2·25H2O进行了X-射线粉末衍射测定。通过三元体系ZnCl2-HCl-H2O(25℃)部分溶度曲线,确定了当液相中盐酸含量大于5.48%时,ZnCl2以ZnCl2·H2O·0.5HCl形式存在。The equilibrium solubility of the sa turated solution of LaCl 3 -ZnCl 2 -HCl (7%)-H 2 O(25℃)quaternary system was determined and the correspondin g equilibrium diagram was constructed.The result shows that this system at25℃is a complex with five solid-phase compounds LaCl 3 ·7H 2 O,3LaCl 3 ·2ZnCl 2 ·25H 2 O,LaCl 3 ·2ZnCl 2 ·11H 2 O,2LaCl 3 ·7ZnCl 2 ·23H 2 O and ZnCl 2 ·H 2 O·0.5HCl,respectively.Last four com pounds have not yet been reported in literatures.The compou nd 3LaCl 3 ·2ZnCl 2 ·25H 2 O has been also characterized by X-ra y diffrac-tion.When HCl (wt )>5.48%in liquid phase,Zinc chlorid e forms the compound ZnCl 2 ·H 2 O·0.5HCl,and it has been verified in ZnCl 2 -HCl-H 2 O(25℃)ternary system.

关 键 词：四元体系 三元体系 氯化镧 氯化锌 

分 类 号：O614.331[理学—无机化学] O614.241[理学—化学]