首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Computationally Designed Crystal Structures of the Supertetrahedral Al4X (X = B, C, Al, Si) Solids
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Computationally Designed Crystal Structures of the Supertetrahedral Al4X (X = B, C, Al, Si) Solids

机译:SuperteTraheDral Al4x(X = B,C,Al,Si)固体的计算设计的晶体结构

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摘要

New metastable crystalline forms of the supertetrahedral Al4X (X = B, C, Al, Si) solids have been computationally designed using density functional theory calculations with imposing of periodic boundary conditions. The geometric and electronic structures of the predicted new systems were calculated on the basis of the diamond lattice in which all carbon atoms are replaced by the Al4X structural units, where X is boron, carbon, aluminum, and silicon atoms. The calculations showed that the dynamic stability of the Al4X crystal structures critically depends on the nature of the bridging atom X: supertetrahedral Al4C and Al4Si solids are dynamically stable, whereas Al4B and Al4Al ones are unstable.
机译:使用密度泛函理论计算计算,使用密度泛的边界条件施加的密度泛函理论计算来计算全新的亚稳态晶体形式的SuperteTrahehral Al4x(X = B,C,Al,Si)固体。 基于所预测的新系统的几何和电子结构是基于所在的金刚石晶格来计算,其中所有碳原子被Al4x结构单元所取代,其中X是硼,碳,铝和硅原子。 计算结果表明,AL4x晶体结构的动态稳定性尺寸依赖性取决于桥接原子X:SuperteTrahehral Al4c和Al4Si固体的性质是动态稳定的,而Al4b和Al4al是不稳定的。

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