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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >The new antimonides ZrNiSb and HfNiSb: Synthesis, structure, and properties in comparison to ZrCoSb and HfCoSb [German]
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The new antimonides ZrNiSb and HfNiSb: Synthesis, structure, and properties in comparison to ZrCoSb and HfCoSb [German]

机译:新的锑化物ZrNiSb和HfNiSb:与ZrCoSb和HfCoSb相比的合成,结构和性能[德语]

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The antimonides ZrNiSb and HfNiSb were prepared by are-melting of stoichiometric mixtures of Zr, ZrSb2 and Ni, and Hf, HfSb2 and Ni, respectively. Unlike ZrCoSb and HfCoSb, which form the LiAlSi structure type, ZrNiSb and HfNiSb crystallize in the TiNiSi type. The lattice dimensions are a = 672.7(2) gm, b = 416.43(8) pm, c = 753.8(1) pm, V = 211.16(7)x10(6) pm(3) for ZrNiSb and a=662.3(5) pm, b = 413.3(3) pm, c = 746.8(8) pm, V=203.4(3)x10(6) pm(3) for HfNiSb (space group Pnma). Whereas no Zr-Zr contacts <400 pm occur in the structure of ZrCoSb, Zr-Zr bonds are found in the structure of ZrNiSb. This difference is a consequence of the different numbers of valence electrons. The structural differences come along with a drastic change in the electronic structure and in the physical properties: ZrNiSb exhibits metallic behavior, in contrast to the not conducting ZrCoSb. [References: 29]
机译:通过分别熔化Zr,ZrSb2和Ni以及Hf,HfSb2和Ni的化学计量混合物来制备锑化物ZrNiSb和HfNiSb。与形成LiAlSi结构类型的ZrCoSb和HfCoSb不同,ZrNiSb和HfNiSb以TiNiSi类型结晶。对于ZrNiSb,晶格尺寸为a = 672.7(2)gm,b = 416.43(8)pm,c = 753.8(1)pm,V = 211.16(7)x10(6)pm(3),a = 662.3(5) )pm,对于HfNiSb(空间群Pnma),b = 413.3(3)pm,c = 746.8(8)pm,V = 203.4(3)x10(6)pm(3)。 ZrCoSb的结构中没有<400 pm的Zr-Zr接触,而ZrNiSb的结构中却没有Zr-Zr键。这种差异是价电子数量不同的结果。结构差异伴随着电子结构和物理性能的急剧变化:与不导电的ZrCoSb相比,ZrNiSb表现出金属性能。 [参考:29]

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