二元二十面体镱镉准晶体的原子结构

IF 37.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nature Materials Pub Date : 2006-12-10 DOI:10.1038/nmat1799

Hiroyuki Takakura, Cesar Pay Gómez, Akiji Yamamoto, Marc De Boissieu, An Pang Tsai

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引用次数: 297

摘要

二十面体准晶体（i-QCs）是一种长程有序固体，表现出五倍旋转等非晶体学对称性。由于大多数稳定的二十面体准晶体都是以三元合金的形式形成的，因此它们的详细原子结构还远未被完全了解。在此，我们通过 X 射线结构测定，首次展示了极少数稳定的二元 i-QCs 之一 i-YbCd5.7 的详细结构解。三个具有独特原子装饰的构建单元准周期性地排列并填充了整个空间。这些单元也是周期性近似晶体的构建单元。该结构不仅在化学上可行，而且还提供了对 i-YbCd5.7 相及其一系列相关 i-QCs 和近似晶体的无缝结构理解，揭示了具有重大物理意义的层次特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Atomic structure of the binary icosahedral Yb–Cd quasicrystal

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Atomic structure of the binary icosahedral Yb–Cd quasicrystal

Icosahedral quasicrystals (i-QCs) are long-range ordered solids that show non-crystallographic symmetries such as five-fold rotations. Their detailed atomic structures are still far from completely understood, because most stable i-QCs form as ternary alloys suffering from chemical disorder. Here, we present the first detailed structure solution of i-YbCd5.7, one of the very few stable binary i-QCs, by means of X-ray structure determination. Three building units with unique atomic decorations arrange quasiperiodically and fill the space. These also serve as building units in the periodic approximant crystals. The structure is not only chemically feasible, but also provides a seamless structural understanding of the i-YbCd5.7 phase and its series of related i-QCs and approximant crystals, revealing hierarchic features that are of considerable physical interest.

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来源期刊

Nature Materials 工程技术-材料科学：综合

CiteScore

62.20

自引率

0.70%

发文量

221

审稿时长

3.2 months

期刊介绍： Nature Materials is a monthly multi-disciplinary journal aimed at bringing together cutting-edge research across the entire spectrum of materials science and engineering. It covers all applied and fundamental aspects of the synthesis/processing, structure/composition, properties, and performance of materials. The journal recognizes that materials research has an increasing impact on classical disciplines such as physics, chemistry, and biology. Additionally, Nature Materials provides a forum for the development of a common identity among materials scientists and encourages interdisciplinary collaboration. It takes an integrated and balanced approach to all areas of materials research, fostering the exchange of ideas between scientists involved in different disciplines. Nature Materials is an invaluable resource for scientists in academia and industry who are active in discovering and developing materials and materials-related concepts. It offers engaging and informative papers of exceptional significance and quality, with the aim of influencing the development of society in the future.