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Syntheses of EuLn2S4 and SrLn2S4 (Ln=Lu, Yb, Er, Y) with Th3P4 Type Structure

  • Y. Ishida
  • N. Kinomura
  • Y. Miyamoto
  • S. Kume
  • M. Koizumi

Abstract

Hirota et al. [1] have indicated that some rare earth sulfides, ALn2S4 (A=Mg, Mn; Ln=Tm, Yb), transform from the spinel-type to the Th3P4-type phase by compression. Another kind of Compound exists whose composition is also denoted as ALn2S4 but whose structure is classified as the CaFe2O4-type [2]. The packing of constituent ions in the CaFe2O4-type is denser than that in spinel but looser than in the Th3P4-type. It is expected, therefore, that the CaFe2O4-type Compounds transfrom to the Th3P4-type phase under pressure more easily than in the case of the spinel-type. This report provides some results of this kind of pressure-induced phase transformation observed in EuLn2S4 (Ln=Y, Er, Yb, Lu) and SrLn2S4 (Ln=Y, Er, Yb). A thermodynamical consideration of the phase transformation of EUY2S4 between the CaFe2O4- and the Th3P4- types is also given.

Keywords

Magnetic Susceptibility Thermodynamical Consideration Electric Power Input Einstein Formula Tropic Relation 
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.

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References

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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • Y. Ishida
    • 1
  • N. Kinomura
    • 1
  • Y. Miyamoto
    • 1
  • S. Kume
    • 1
  • M. Koizumi
    • 1
  1. 1.Osaka UniversityOsakaJapan

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