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Soviet Powder Metallurgy and Metal Ceramics

, Volume 7, Issue 12, pp 964–965 | Cite as

The phases in the lanthanum-germanium system

  • K. A. Lynchak
  • Yu. B. Kuz'ma
  • T. Ya. Kosolapova
Test Methods and Properties of Materials

Conclusions

The lanthanum-germanium system was investigated. The existence of four, previously established compounds was confirmed. The width of the homogeneity region of the lanthanum-rich compounds is narrow. The width of the homogeneity region of lanthanum digermanide extends over the composition range LaGe-LaGe2.0, which corresponds to germanium contents of 42–51%. Lanthanum digermanide exhibits two modifications with crystalline structures of the α-ThSi2 and α-GdSi2 types, which are capable of independent existence at room temperature. The phase with an α-GdSi2 type structure forms at germanium contents corresponding to the compositions LaGe1.8-LaGe2.0, while the α-ThSi2 type structure forms at germanium contents lower than theoretical (42–45 wt.%). At the composition LaGe1.7, the phases with the α-GdSi2 and α-ThSi2 type structures coexist.

Keywords

Germanium Lanthanum Crystalline Structure Structure Form Type Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Literature cited

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Copyright information

© Consultants Bureau 1969

Authors and Affiliations

  • K. A. Lynchak
    • 1
  • Yu. B. Kuz'ma
    • 1
  • T. Ya. Kosolapova
    • 1
  1. 1.Institute of Materials ScienceAcademy of Sciences of the Ukrainian SSRUkraine

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