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用差热分析、X—射线衍射和金相学分析重新研究了镧—铜二元体系。在这个系统里,现在已经发现了四种中间金属化合物的存在。即:LaCu、LaCu_2、LaCu_5和LaCu_6,并且已经测定了它们的晶体结构。其中的两个,LaCu_2和LaCu_6相应地分别于830℃和950℃熔化;其它两个,LaCu和LaCu_5分别在525℃和805℃形成包晶。共晶点发生在大约9.0原子％La(865℃),24.5原子％La(745℃)和71.5原子％La(475℃)。没有观测到值得重视的La在Cu中或Cu在La中的固体溶解度。
The lanthanum-copper binary system was re-investigated by DTA, X-ray diffraction and metallographic analysis. In this system, four intermediate metal compounds have now been found. Namely: LaCu, LaCu_2, LaCu_5 and LaCu_6, and their crystal structures have been determined. Two of them, LaCu_2 and LaCu_6, respectively melt at 830 ° C and 950 ° C, respectively; the other two, LaCu and LaCu_5, form perovskites at 525 ° C and 805 ° C, respectively. The eutectic point occurs at about 9.0 atomic% La (865 ° C), 24.5 atomic% La (745 ° C), and 71.5 atomic% La (475 ° C). No appreciable solid solubility of La in Cu or Cu in La is observed.