Equiatomic rare earth (Ln) transition metal antimonides LnTSb (T=Rh, Ir) and bismuthides LnTBi (T=Rh, Ni, Pd, Pt)
Equiatomic rare earth (Ln) transition metal antimonides LnTSb (T=Rh, Ir) and bismuthides LnTBi (T=Rh, Ni, Pd, Pt)
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DOI：
10.1006/jssc.2002.9670
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发表时间：
2002-10-01
影响因子：
3.3
通讯作者：
Jeitschko, W
中科院分区：
文献类型：
--
作者：
Haase, MG;Schmidt, T;Jeitschko, W
通过元素组分的高温反应，合成了38个新的三元等原子锑化物和铋化物，并通过单晶X射线衍射数据对其中4个化合物的结构进行了修正。锑化物LnRhSb（Ln = Sm，Gd-Tm）和LnIrSb（Ln = La-Nd，Sm，Gd-Tm）晶体具有正交TiNiSi型结构，对TbRhSb进行了细化（a = 713.3（2）pm，B = 452.0（1）pm，c = 778.8（2）pm，对306个结构因子和20个可变参数，R = 0.016）和SmIrSb（对于559个F值和20个变量，a 722.4（2）pm，B = 452.9（1）pm，c = 786.1（2）pm，R = 0.023）。铋化物LnRhBi（Ln = Pr-Sm）也以TiNiSi型结构结晶，其对于SmRhBi（a = 728.0（2）pm，B 467.9（1）pm，c = 795.7（2）pm，对于481个F值和20个变量R = 0.037）进行了细化。通过DyRhBi的结构优化，确定了化合物LnRhBi（Ln = Gd-Er）的六方ZrNiAl型结构（a = 757.9（2）pm，c = 392.6（1）pm，R = 0.026，F值为423，变量为14）。铋化物LnNiBi（Ln = Pr，Nd，Sm，Tb，Ho，Er），ScPdBi，LnPdBi（Ln = La，Er，Tin，Lu）和LaPtBi与立方MgAgAs是同型的。这些等原子三元铋化物的原子顺序确定为PrNiBi和LaPtBi从X射线粉末数据。这些化合物的结构化学进行了简要讨论。(C)2002 Elsevier Science（美国）。
Thirty-eight new ternary equiatomic antimonides and hismuthides were prepared by reaction of the elemental components at high temperatures, and the structures of four compounds were refined from single-crystal X-ray data. The antimonides LnRhSb (Ln = Sm, Gd-Tm) and LnIrSb (Ln = La-Nd, Sm, Gd-Tm) crystallize with the orthorhombic TiNiSi-type structure, which was refined for TbRhSb (a = 713.3(2) pm, b = 452.0(1) pm, c = 778.8(2) pm, R = 0.016 for 306 structure factors and 20 variable parameters) and SmIrSb (a 722.4(2) pm, b = 452.9(1) pm, c = 786.1(2) pm, R = 0.023 for 559 F values and 20 variables). The bismuthides LnRhBi (Ln = Pr-Sm) also crystallize with TiNiSi-type structure which was refined for SmRhBi (a = 728.0(2) pm, b 467.9(1) pm, c = 795.7(2) pm, R = 0.037 for 481 F values and 20 variables). The hexagonal ZrNiAl-type structure was established for the compounds LnRhBi (Ln = Gd-Er) through a structure refinement of DyRhBi (a = 757.9(2) pm, c = 392.6(1) pm, R = 0.026 for 423 F values and 14 variables). The bismuthides LnNiBi (Ln = Pr, Nd, Sm, Tb, Ho, Er), ScPdBi, LnPdBi (Ln = La, Er, Tin, Lu), and LaPtBi are isotypic with cubic MgAgAs. The atomic order for these equiatomic ternary bismuthides was determined for PrNiBi and LaPtBi from X-ray powder data. The structural chemistry of these compounds is briefly discussed. (C) 2002 Elsevier Science (USA).