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Ternary indides Eu_2Pd_2In and Eu_2Pt_2In

机译:三元系Eu_2Pd_2In和Eu_2Pt_2In

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摘要

The indides Eu_2Pd_2In and Eu_2Pt_2In were synthesized from the elements in sealed tantalum tubes in an induction furnace. The samples were characterized by powder X-ray diffraction. The structures were refined on the basis of single-crystal X-ray diffractometer data: HT-Pr_2Co_2Al type, C2/c, a = 1035.7(2), b = 592.9(1), c = 823.6(2) pm, β = 104.26(1) °, wR2 = 0.026, 1075 F~2 values, 25 variables for Eu_2Pd_2In and a = 1017.2(2), b = 588.7(1), c = 826.5(1) pm, β = 103.76(1) °, wR2 = 0.062, 706 F~2 values, 25 variables for Eu_2Pt_2In. The indium atoms have four platinum (palladium) neighbors in strongly distorted tetrahedral coordination at Pt-In and Pd-In distances ranging from 273 to 275 pm. These InPd~(4/2) and InPt ~(4/2) units are condensed via common edges to infinite InPd_2 and InPt_2 chains, which are surrounded by the europium atoms. The chains form the motif of hexagonal rod packing.
机译:在感应炉中用密封钽管中的元素合成了In_2的Eu_2Pd_2In和Eu_2Pt_2In。通过粉末X射线衍射对样品进行表征。根据单晶X射线衍射仪数据精制结构:HT-Pr_2Co_2Al型,C2 / c,a = 1035.7(2),b = 592.9(1),c = 823.6(2)pm,β= 104.26(1)°,wR2 = 0.026,10〜75 F〜2值,Eu_2Pd_2In的25个变量,a = 1017.2(2),b = 588.7(1),c = 826.5(1)pm,β= 103.76(1)° ,wR2 = 0.062,706 F〜2值,Eu_2Pt_2In的25个变量。铟原子在Pt-In和Pd-In距离范围为273至275 pm时,具有严重扭曲的四面体配位关系的四个铂(钯)邻居。这些InPd〜(4/2)和InPt〜(4/2)单元通过公共边缘冷凝成无限的InPd_2和InPt_2链,它们被the原子包围。链条构成六角形杆状填料的图案。

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