Interaction between the components in Tm-Cr-Ge system at 1070 K

L. Romaka; Yu. Stadnyk; V.V. Romaka; M. Konyk

doi:10.15330/pcss.23.4.633-639

Authors

L. Romaka Ivan Franko National University of Lviv, Lviv, Ukraine
Yu. Stadnyk Ivan Franko National University of Lviv, Lviv, Ukraine
V.V. Romaka Institute for Solid State Research, IFW-Dresden, Dresden, Germany
M. Konyk Ivan Franko National University of Lviv, Lviv, Ukraine

DOI:

https://doi.org/10.15330/pcss.23.4.633-639

Keywords:

intermetallics, ternary system, phase equilibria, crystal structure

Abstract

The phase equilibrium diagram of the Tm–Cr–Ge ternary system was constructed at a temperature 1070 K based on the results of X-ray phase, microstructural analyzes and energy-dispersive X-ray spectroscopy in the whole concentration range. At the temperature of investigation, two new ternary compounds are realized in the system: TmCr₆Ge₆ (SmMn₆Sn₆ structure type, space group P6/mmm, a=0.51506(1), c=0.82645(2) nm) and Tm₄Cr₄Ge₇ (Zr₄Co₄Ge₇ structure type, space group I4/mmm, а=1.39005(9), с=0.54441(1) nm). Inclusion of Cr atoms in the structure of the binary germanide TmGe₂ (structure type ZrSi₂) up to 10 at. % Cr leads to the formation of a solid solution TmCr_xGe₂ (x = 0-0.33).

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