Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (02): 173-177.doi: 10.3866/PKU.WHXB19890209

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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
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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℃.