物理化学学报 >> 1989, Vol. 5 >> Issue (02): 173-177.doi: 10.3866/PKU.WHXB19890209

研究论文 上一篇    下一篇

PrCl3-BaCl2-LiCl三元体系相图的研究

郑朝贵; 靳军; 乔芝郁; 叶于浦   

  1. 北京大学化学系
  • 收稿日期:1987-09-09 修回日期:1988-02-26 发布日期:1989-04-15
  • 通讯作者: 郑朝贵

AN INVESTIGATION ON PHASE DIAGRAM OF TERNARY SYSTEM PrCl3-BaCl2-LiCl

Zheng Chaogui; Jin Jun; Qiao Zhiyu; Ye Yupu   

  1. Department of Chemistry; Peking University
  • Received:1987-09-09 Revised:1988-02-26 Published:1989-04-15
  • Contact: Zheng Chaogui

摘要: 本文借助于DTA与X射线结构分析研究了PrCl_3-BaCl_2-LiCl三元体系相同。发现本体系内有对应于PrCl_2、α-BaCl_2、β-BaCl_2、LiCl和Ba_2PrCl_3的五个液相面、六条二次结晶线、一个三元低共熔点E(72.1wt%PrCl_3,2.8wt%BaCl_2,25.1wt%LiCl;441℃)和三元转熔点P(62.5wt%PrCl_3,12.5wt%BaCl_2,25.0wt%LiCi;490℃)。同时发现有一固相下形成的不稳定化合物Y(430℃分解)。

Abstract:

The phase diagram of ternary system PrCl_3-BaCl_2-LiCl has been investigated by means of DTA and X-ray diffraction analysis. It is found that there are 5 surfaces corresponding to the primary crystallization of PrCl_3, α-BaCl_2, β-BaCl_2,LiCl and Ba_3PrCl_9 respectively and 6 univariant lines related to the secondary crystallization in this system.The two reactions occurred in this system are:
L<=>LiCl+PrCl_3+Ba_3PrCl_9
E(72.1wt%PrCl_3, 2.8wt%BaCl_2, 25.1wt%LiCl; Temp.441℃)
L+△β-BaCl_2<=>Ba_3PrCl_9+LiCl
P(62.5wt%PrCl_3, 12.5wt%BaCl_2, 25.0wt%LiCl; Temp.490℃)
A compound, formed in the solid state, was found. The temperature of decomposition occures at 430℃.