| Syntheses and Crystal Structure Characterizations of New Rare Earth Copper Bismuth Compounds RE CuBi2 （RE = La, Gd and Dy） |
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| 引用本文： | 鲁玉明,杨昕昕,陈昊鸿,赵景泰.Syntheses and Crystal Structure Characterizations of New Rare Earth Copper Bismuth Compounds RE CuBi2 （RE = La, Gd and Dy）[J].中国稀土学报(英文版),2004,22(6):746-748. |
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| 作者姓名： | 鲁玉明 杨昕昕 陈昊鸿 赵景泰 |
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| 作者单位： | StateKeyLaboratoryofHighPerformanceCeramicsandSupe~ineMicrostructure,ShanghaiInstituteofCeramics,ChineseAcademyofSciences,Shanghai200050,China |
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| 摘 要： | The tide 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) nm^3 for LaCuBi2, a = 0.449279(9) nm, c = 0. 95958(4) nm, V = 0. 19369(2) nm^3 for GdCuBi2 and a =0. 447680(7) nm, c =0. 95124( 3 ) nm, V = 0. 190644(5 )nm^3 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.
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| 关 键 词： | 金属间化合物 铜 铋 稀土元素 晶体结构特征 |
Syntheses and Crystal Structure Characterizations of New Rare Earth Copper Bismuth Compounds RE CuBi2(RE＝La,Gd and Dy) |
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| Lu Yuming,Yang Xinxin,Chen HaohongZhao Jingtai.Syntheses and Crystal Structure Characterizations of New Rare Earth Copper Bismuth Compounds RE CuBi2(RE＝La,Gd and Dy)[J].Journal of Rare Earths,2004,22(6):746-748. |
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| Authors: | Lu Yuming Yang Xinxin Chen HaohongZhao Jingtai |
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| Affiliation: | Lu Yuming,Yang Xinxin,Chen HaohongZhao Jingtai~* |
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| 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. |
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| Keywords: | intermetallics copper bismuth rare earths |
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