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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >The coloring problem in the solid-state metal boride carbide ScB2C2: a theoretical analysis
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The coloring problem in the solid-state metal boride carbide ScB2C2: a theoretical analysis

机译:固态金属碳化硼ScB2C2中的着色问题:理论分析

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摘要

The electronic properties of the layered ternary metal boride carbide ScB2C2, the structure of which consists of B/C layers made of fused five-and seven-membered rings alternating with scandium sheets, are analyzed. In particular, the respective positions of the B and C atoms (the so-called coloring problem) are tackled using density functional theory, quantum theory of atoms in molecules, and electron localizability indicator calculations. Results reveal that (i) the most stable coloring minimizes the number of B-B and C-C contacts and maximizes the number of boron atoms in the heptagons, (ii) the compound is metallic in character, and (iii) rather important covalent bonding occurs between the metallic sheets and the boron-carbon network.
机译:分析了层状三元金属碳化硼ScB2C2的电子性能,该结构的结构由B / C层组成,该B / C层由稠合的五元和七元环与scan片交替形成。特别地,使用密度泛函理论,分子中原子的量子理论和电子定位性计算来解决B和C原子的各个位置(所谓的着色问题)。结果表明:(i)最稳定的着色使七边形中的BB和CC接触数最小化,并使硼原子的数目最大化,(ii)该化合物具有金属性,并且(iii)两者之间存在相当重要的共价键金属薄板和硼碳网络。

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