Atomic structure of the binary icosahedral Yb-Cd quasicrystal

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

doi:10.1038/nmat1799

Atomic structure of the binary icosahedral Yb-Cd quasicrystal

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

Center for Exploration of New Inorganic Materials

Research output: Contribution to journal › Article › peer-review

249 Citations (Scopus)

Abstract

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-YbCd"5"."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-YbCd"5"."7 phase and its series of related i-QCs and approximant crystals, revealing hierarchic features that are of considerable physical interest.

Original language	English
Pages (from-to)	58-63
Number of pages	6
Journal	Nature Materials
Volume	6
Issue number	1
DOIs	https://doi.org/10.1038/nmat1799
Publication status	Published - 2007 Jan 10

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "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-YbCd{"}5{"}.{"}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-YbCd{"}5{"}.{"}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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AU - Tsai, An Pang

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