Crystal structures of the compounds formed in DyCo2-DyGa2 pseudo-binary system at 773K
Serials of DyCo2-xGax alloys with x from O to 2 were prepared by arc melting and investigated by X-ray powder diffraction analysis．Four ternary compounds，DyCo1.33Ga0.67，DyCoGa,DyCo0.67-0.35Ga1.33-1.65 and DyCo0.25-0.15Ga1.75-1.85，were formed in the serial alloys with different Ga content x．The crystal structures for these compounds were determined by Rietveid refinement method using TOPAS V3.0 software．The Rietveld refinement results reveal that DyCo1.33Ga0.67 has MgZn2-type structure(P63/mmc)with a=5.414(1)and c=8.452(1)A．DyCoGa is of Co2Si-type structure(Pnma)with a=7.052(1)，b=4.393(1)and C=6.958(1)A;DyCoo．5Ga1.5 has GdPdSi-type structure(Imma)with a=4.341(1)，b=7.007(1)and C=7.551(1)A;and DyC00.2Ga1.8 has AIB2-type structure(P6/mmm)with a=4.339(1)and c=3.634(1)A．The relationships between these structures were discussed．
晶体结构 X射线衍射 赝二元系 电弧熔炼
Liu FuSheng Ao WeiQin Wu Li Li JunQin
College of Materials Science and Engineering,Shenzhen University and Shenzhen Key Laboratory of Spec The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Material
国内会议
长沙
英文
91-97
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）