Crystal structure of R3Co8Sn4 compounds (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y)
Crystal structure of R3Co8Sn4 compounds (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y)
复制标题
DOI：
10.1016/s0925-8388(99)00588-5
复制
发表时间：
2000-02-02
影响因子：
6.2
通讯作者：
Pani, M
中科院分区：
文献类型：
--
作者：
Canepa, F;Cirafici, S;Pani, M
本文合成了R_3Co_8Sn_4（R =稀土）化合物，并对其进行了单晶和粉末X射线衍射研究。具有R = Pr、Nd、Sm、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu和Y的相以Lu3Co7.77Sn4结构类型结晶，但是具有全部占据的所有原子位置，在除镥相之外的所有情况下给出3：8：4的化学计量。在La、Ce和Sc的体系中没有发现所研究的相。这些化合物应该取代以前报道的RCo 3Sn相。晶格常数对稀土尺寸的轻微异常依赖性可以归因于Co-Sn键的强化。(C)2000 Elsevier Science S.A. All rights reserved.
The R3Co8Sn4 compounds (R = rare earth) have been synthesized and studied by single crystal and powder X-ray diffractometry. The phases with R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y crystallize in the Lu3Co7.77Sn4 structure type, but with full occupancy of all atomic positions, giving 3:8:4 stoichiometry in all cases except the lutetium phase. The studied phase was not found in the systems with La, Ce and Sc. These compounds should replace the previously reported RCo3Sn phases. The slightly anomalous dependence of the lattice constants on the rare earth size can be ascribed to strengthening of the Co-Sn bonds. (C) 2000 Elsevier Science S.A. All rights reserved.