LaCl_3－SrCl_2－MgCl_2三元体系相图  

Phase Diagram of Ternary System LaCl_3-SrCl_2-MgCl_2

作　　者：郑朝贵[1] 郑燕珂 

机构地区：[1]北京大学化学系

出　　处：《高等学校化学学报》1994年第4期478-480,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：本文借助于ＤＴＡ和Ｘ射线结构分析测定了ＬａＣｌ_３－ＳｒＣｌ_２－ＭｇＣｌ_２三元体系相图，发现它属简单低共熔型，体系内有对应于ＬａＣｌ_３、ＳｒＣｌ_２和ＭｇＣｌ_２的３个液相面、３条２次结晶线和１个三元低共熔点Ｅ（１５．０ｗｔ％ＬａＣｌ_３，４９．５ｗｔ％ＳｒＣｌ_２，３５．５ｗｔ％ＭｇＣｌ_２；５４５℃），并且在固相下有一个不稳定的化合物生成，在约５００℃时分解。Three surfaces corresponding to the primary crystallization of LaCl_3 , SrCl_2 and MgCl_2, respectively, 3 univariant curves related to the secondary crystallization and a ternary eutectic (15.0wt% LaCl_3,49.5wt% SrCl_2, 35.5 wt% MgCl_2; 545℃) were found in LaCl_3-SrCl_2-MgCl_2 system by means of DTA and X-ray diffraction analysis, A reaction occurs in this system : L=LaCl_3+ SrCl_2+ MgCl_2.An unstable compound has been found in the solid which decomposed at about 500℃.

关 键 词：相图 稀土金属 稀土熔盐 

分 类 号：O614.33[理学—无机化学]