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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >ThSi _2 type ytterbium disilicide and its analogues YbT _xSi _(2-x) (T = Cr, Fe, Co)
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ThSi _2 type ytterbium disilicide and its analogues YbT _xSi _(2-x) (T = Cr, Fe, Co)

机译:ThSi _2型二硅化and及其类似物YbT _xSi _(2-x)(T = Cr,Fe,Co)

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摘要

YbSi _2 and the derivatives YbT _Si _(2-x) (T = Cr, Fe, Co) crystallizing in the α-ThSi _2 structure type were obtained as single crystals from reactions run in liquid indium. All silicides were investigated by single-crystal X-ray diffraction, I4 _1/amd space group and the lattice constants are: a = 3.9868(6) ? and c = 13.541(3) ? for YbSi _2, a = 4.0123(6) ? and c = 13.542(3) ? for YbCr _(0.27)Si _(1.73), a = 4.0142(6) ? and c = 13.830(3) ? for YbCr _(0.71)Si _(1.29), a = 4.0080(6) ? and c = 13.751(3) ? for YbFe _(0.34)Si _(1.66), and a = 4.0036(6) ?, c = 13.707(3) ? for YbCo _(0.21)Si _(1.79). YbSi _2 and YbT _xSi _(2-x) compounds are polar intermetallics with three-dimensional Si and M (T+Si) polyanion sub-networks, respectively, filled with ytterbium atoms. The degree of substitution of transition metal at the silicon site is signficant and leads to changes in the average bond lengths and bond angles substantially.
机译:通过在液态铟中进行的反应,以单晶形式获得以α-ThSi_2结构类型结晶的YbSi _2和衍生物YbT _Si _(2-x)(T = Cr,Fe,Co)。通过单晶X射线衍射,I 4 _1 / amd空间基团研究所有硅化物,并且晶格常数为:a = 3.9868(6)≤m。和c = 13.541(3)?对于YbSi _2,a = 4.0123(6)?和c = 13.542(3)?对于YbCr _(0.27)Si _(1.73),a = 4.0142(6)?和c = 13.830(3)?对于YbCr _(0.71)Si _(1.29),a = 4.0080(6)?和c = 13.751(3)?对于YbFe _(0.34)Si _(1.66),a = 4.0036(6)α,c = 13.707(3)α。 YbCo _(0.21)Si _(1.79)。 YbSi _2和YbT _xSi _(2-x)化合物是极性金属互化物,分别带有三维Si和M(T + Si)聚阴离子子网络,并充满原子。过渡金属在硅位置的取代度很重要,并且会导致平均键长和键角的变化。

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