The phase equilibria at 500°C of the Gd-Cr-AI system have been investigated in the whole concentration region. Three ternary compounds were confirmed and their homogenity regions have been investigated. The crystal structure of all compounds have been refined by Rietveld profile analysis: GdCr23-20AI19.7-20.0 (CeCr2AI20 structure type, space group Fd3m, a=1.44718(3)-1.44822(4) nm), Gd6Cr4AI43 (Ho6Mo4AI43 structure type, space group P63/mcm, a=1.09126(14) nm, c=1.7749(3) nm), GdCr4.0-28AI8.0-92 (ThMn12 structure type, space group I4/mmm, a=0.89780(18)-0.90395(15) nm, c=0.51 332(9)-0.51 253(9) nm).
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