Isothermal Section of Er-Ag-Sn System at 873 K

  • Dmitry Elnyakov
  • Konstantin Kalmykov
  • Sergey Dunaev


The isothermal section of the Er-Ag-Sn system at 873 K was constructed with the use of scanning electron microscopy, energy-dispersive x-ray microanalysis and x-ray powder diffraction. Two ternary compounds were confirmed at this temperature: ErAgSn (LiGaGe structure type, P63mc, Z = 2, a = 4.6595(2) Å, c = 7.2872(3) Å) and non-stoichiometric phase ErAg1−xSn2+x (Cu3Au structure type, Pm-3m, Z = 1). For the last one homogeneity range was established (0.08 < x < 0.24) and lattice parameters were determined (a = 4.5007(4), 4.5040(2), 4.5107(1), 4.5412(1) Å for the compositions Er25.4Ag23.4Sn51.2, Er25.7Ag23.0Sn51.3, Er25.7Ag21.7Sn52.6, Er25.2Ag18.6Sn56.2 (at.%) respectively). Melting point of the phase Er25.7Ag21.7Sn52.6 (at.%) was determined to be 1199 K by differential thermal analysis.


experimental phase equilibria intermetallics ternary system 



X-ray part of this study was supported by the Russian Ministry of Science and Education (Grant No. RFMEFI61616X0069).


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Copyright information

© ASM International 2018

Authors and Affiliations

  • Dmitry Elnyakov
    • 1
  • Konstantin Kalmykov
    • 1
  • Sergey Dunaev
    • 1
  1. 1.Department of ChemistryLomonosov Moscow State UniversityMoscowRussia

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