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本文借助于DTA研究了PrCl_3-CaCl_2-MgCl_2三元体系相图发现:本体系属简单低共熔型相图。体系内有对应于PrCl_3,CaCl_2和MgCl_2的三个液相面,三条二次结晶线和一个三元低共熔点E(44.8wt-%PrCl_3,31.8wt-%CaCl_2,546℃)。

Three surfaces corresponding to the primary crystallization of PrCl_3, CaCl_2 andMgCl_2, respectively, 3 univariant curves related to the secondary crystallization and a ternaryeutectic (44.8wt-% PrCl_3, 31.8wt-% CaCl_2, 546℃) were found in the system PrCl_3-CaCl_2-MgCl_2 by means of DTA. A reaction occurs in this system: L=PrCl_3+CaCl_2+MgCl_2.

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