Syntheses and Crystal Structure Characterizations of New Rare Earth Copper Bismuth Compounds RE CuBi2(RE＝La,Gd and Dy)
来源期刊：JOURNAL OF RARE EARTHS2004年第6期
论文作者：赵景泰 鲁玉明 杨昕昕 陈昊鸿
Key words：intermetallics; copper; bismuth; rare earths;
Abstract: The title new compounds with chemical formula RE CuBi2 were synthesized by arc melting method followed by annealing. The crystal structures refined using Rietveld method and X-ray powder diffraction data show to be isotypic to CaMnBi2 structure type with space group P4/nmm(No.129). The unit cell parameters are a=0.457946(4)nm,c=0.98858(2)nm, V=0.207319(8)nm3 for LaCuBi2, a=0.449279(9)nm, c= 0.95958(4)nm, V= 0.19369(2)nm3 for GdCuBi2 and a=0.447680(7)nm, c=0.95124(3)nm,V=0.190644(5)nm3 for DyCuBi2 respectively, showing lanthanide contraction. The structure is characterized by layers of edge-shearing CuBi4 tetrahedron and covalently bonded Bi square net separated by rare earth atoms.
赵景泰1，鲁玉明1，杨昕昕1，陈昊鸿1
(1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics, Chinese Academy of Sciences,Shanghai 200050,China)
Abstract:The title new compounds with chemical formula RE CuBi2 were synthesized by arc melting method followed by annealing. The crystal structures refined using Rietveld method and X-ray powder diffraction data show to be isotypic to CaMnBi2 structure type with space group P4/nmm(No.129). The unit cell parameters are a=0.457946(4)nm,c=0.98858(2)nm, V=0.207319(8)nm3 for LaCuBi2, a=0.449279(9)nm, c= 0.95958(4)nm, V= 0.19369(2)nm3 for GdCuBi2 and a=0.447680(7)nm, c=0.95124(3)nm,V=0.190644(5)nm3 for DyCuBi2 respectively, showing lanthanide contraction. The structure is characterized by layers of edge-shearing CuBi4 tetrahedron and covalently bonded Bi square net separated by rare earth atoms.
Key words:intermetallics; copper; bismuth; rare earths;
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