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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >The gold-rich indide Eu _5Au _(17.7)In _(4.3) and its relation with the structures of SrAu _(4.76)In _(1.24) and BaLi4
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The gold-rich indide Eu _5Au _(17.7)In _(4.3) and its relation with the structures of SrAu _(4.76)In _(1.24) and BaLi4

机译:富金铟Eu _5Au _(17.7)In _(4.3)及其与SrAu _(4.76)In _(1.24)和BaLi4的结构的关系

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摘要

The gold-rich indide Eu _5Au _(17.7)In _(4.3)was synthesized from the elements in a sealed tantalum ampoule that was heated in a high-frequency furnace. Eu _5Au _(17.7)In _(4.3)crystallizes with a new monoclinic structure type: C2/m, a = 902.7(2), b = 722.8(3), c = 1734.1(4) pm, ? = 94.31(3)°, wR2 = 0.0907, 2640 F ~2 values and 74 variables. Eu _5Au _(17.7)In _4.3has a pronounced gold substructure with Au-Au distances ranging from 278 to 300 pm. The striking structural motifs in the gold substructure are networks of Au6 hexagons and discrete units of corner- and edge-sharing Au4 tetrahedra. Eu _5Au _(17.7)0In _(4.30) exhibits a small homogeneity range with In/Au mixing on two Wyckoff sites. Geometrically, the Eu _5Au _(17.7)In _(4.3)structure can be explained as an intergrowth variant of slightly distorted SrAu _(4.76)In _(1.24)- and BaLi _4-related slabs. The europium coordination in the BaLi4 slabs is similar to binary EuAu _2.
机译:富金铟Eu _5Au _(17.7)In _(4.3)是由密封的钽安瓿瓶中的元素合成的,该钽安瓿瓶在高频炉中加热。 Eu _5Au _(17.7)In _(4.3)以新的单斜晶结构类型结晶:C2 / m,a = 902.7(2),b = 722.8(3),c = 1734.1(4)pm,? = 94.31(3)°,wR2 = 0.0907,2640 F〜2值和74个变量。 Eu _5Au _(17.7)在_4.3中具有明显的金子结构,Au-Au距离范围从278到300 pm。金子结构中的醒目的结构图案是Au6六边形的网络以及角和边缘共享Au4四面体的离散单元。 Eu _5Au _(17.7)0In _(4.30)在In / Au混合在两个Wyckoff位点上时表现出较小的均匀性范围。从几何学上讲,Eu _5Au _(17.7)In _(4.3)结构可以解释为与(_1.24)-和BaLi _4相关的SrAu _(4.76)In轻微变形的共生变体。 BaLi4平板中的coordination配位与二元EuAu _2相似。

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