X-RAY POWDER DIFFRACTION DATA AND STRUCTURAL REFINEMENT OF Er₃Co₆Sn₅

来源期刊：中国有色金属学报(英文版)1999年第1期

论文作者：He Wei Zeng Lingmin Qin Wen Yan Jialin Hao Jianmin

文章页码：86 - 88

Key words：Er₃Co₆Sn₅;　X-ray powder diffraction;　Rietveld structural refinement

Abstract: The compound Er₃Co₆Sn₅ has been studied by means of X-ray powder diffraction technique and refined by Rietveld method. The compound Er₃Co₆Sn₅has an orthorhombic Dy₃Co₆Sn₅-type structure, space group Immm (No.71),Z=2 and Dx=9.465g/cm³. At room temperature, the lattice constants are a=4.296 6(4) ,b=12.289 7(9) ,c=9.627 1(6) . The Rietveld structural refinement was performed and led to R_wp=0.196 and R_p=0.153. The figure of meritFNfor the X-ray powder diffraction data is F₃₀ =34.7 (0.009 0, 96). The present structural refinement supports that Er(1), Er(2), Co(1), Co(2), Sn (1) and Sn(2) atoms occupy the 2a, 4g, 4j, 8l, 2cand 8lpositions, respectively.