The 773K Isothermal Section Of The Dy-Al-Sb Ternary System And Powder Diffraction Data Of A New Compound Al_0.35GdGe₂

Phase relations in the Dy-Al-Sb ternary system at 773K have been investigated in this work.The crystal structure of the compound Al_0.35GdGe₂ have also been studied. The main contents were as follows:1 The isothermal section of Dy-Al-Sb ternary system at 773KThe phase relationship in the Dy-Al-Sb ternary system at 773k has been studied by means of X-ray powder diffraction,differential thermal analysis and optical microscope.There are 12 single-phase regions,12 two-phase regions and 10 three-phase regions in this ternary system at 773K.No ternary compound was found in this system at 773K.2 Powder diffraction data of a new compound Al_0.35GdGe₂The crystal structure of the compound Al_0.35GdGe₂ has been studied by X-ray powder diffraction technique and refined by Rietveld profile fitting method.The compound has an orthorhombic space group Cmcm(No.63)with the lattice parameters a=4.0874(2)(?),b=16.1499(5)(?),c=3.9372(1)(?),Z=4,D_calc=8.007g/cm³ and CeNiSi₂ structure type.The Rietveld refinement result was R_p=10.6%,R_F=5.61%and S=1.49.