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Revealing phase relations between Fe2B7 and FeB4 and hypothetical Fe2B7-type Ru2B7 and Os2B7: first-principles calculations

机译:Fe 2 B 7 和FeB 4 与假设的Fe 2 B 7 之间的揭示相关系sub>型Ru 2 B 7 和Os 2 B 7 :第一性原理计算

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Investigation of new materials recovered using high pressure can foresee the unobservable structures and bonding of crystals. Employing first-principles calculations, we aim to provide an atomic understanding of the origin of multiple phases and mutual intergrowth for metastable iron borides. The competing FeB4 and Fe2B7 in the experiment are compared by their enthalpy and structural features. The closely similar enthalpy of Fe2B7 + B and Fe2B8 (FeB4) may explain the coexistence and tight mutual intergrowth of these two phases. The hypothetical Ru2B7 and Os2B7 are also suggested by the stability evaluations. The stable Ru2B7 and Os2B7 show an interesting metallic property and a great mechanical property due to the hybridization of metal-d and B-p orbitals and B–B covalent bonding.
机译:对使用高压回收的新材料的研究可以预见晶体的不可观察结构和键合。我们采用第一性原理计算,旨在提供对亚稳硼化铁的多相起源和相互共生的原子理解。竞争的FeB 4 和Fe 2 B 7 在实验中通过焓和结​​构特征进行比较。 Fe 2 B 7 + B和Fe 2 B 8 (FeB 4 )可以解释它们的共存和紧密共生两个阶段。假设的Ru 2 B 7 和Os 2 B 7 。稳定的Ru 2 B 7 和Os 2 B 7 由于金属d和Bp轨道的杂化以及BB共价键的结合,显示出有趣的金属性能和出色的机械性能。

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