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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Distribution of the M-M distances in the oxides of the group 13 elements and their spinels and delafossites
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Distribution of the M-M distances in the oxides of the group 13 elements and their spinels and delafossites

机译：第13组元素的氧化物及其尖晶石和铜铁矿中M-M距离的分布

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An analysis of the distribution of the M-M distances (M = Al, Ga, In, Tl) in all their binary, ternary and quaternary oxides, contained in the Inorganic Crystal Structure Database (ICSD95), shows that the M-M distances are not distributed uniformly but present maxima at values which are near the corresponding distances in pure metals. As for boron, this feature reflects the tendency of these elements to form aggregates in their compounds. These metal aggregates maintain distances and in many instances, also the topology of the elemental structures, as is illustrated here with two families of structures, i.e. spinels and delafossites. In spinels, the group 13 cations form a 3D (three-dimensional) network of truncated tetrahedra, which are also found in the Zintl phases of these elements. In MgAl2O4 the Al subnet is identical, in topology and dimensions, to that of CaAl2 and both reproduce exactly half of the f.c.c. (face-centred cubic) net of Al metal. [References: 41]
机译：对无机晶体结构数据库（ICSD95）中包含的所有二元，三元和四元氧化物中MM距离（M = Al，Ga，In，Tl）的分布进行的分析表明，MM距离不是均匀分布的但存在的最大值接近纯金属中相应距离的值。对于硼，此特征反映了这些元素在其化合物中形成聚集体的趋势。这些金属聚集体保持距离，并且在许多情况下还保持元素结构的拓扑，如此处用两个结构族，即尖晶石和铜铁矿所示。在尖晶石中，第13组阳离子形成了截短的四面体的3D（三维）网络，在这些元素的Zintl相中也发现了该结构。在MgAl2O4中，Al子网在拓扑结构和尺寸上与CaAl2相同，并且两者都完全复制了f.c.c的一半。 （面心立方）铝金属网。 [参考：41]

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