The structure of a decagonal Al72Ni20Co8quasicrystal

Hiroyuki Takakura; Akiji Yamamoto; An Pang Tsai

doi:10.1107/S0108767301007942

The structure of a decagonal Al₇₂Ni₂₀Co₈quasicrystal

Hiroyuki Takakura, Akiji Yamamoto, An Pang Tsai

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

84 Citations (Scopus)

Abstract

The structure of a decagonal Al₇₂Ni₂₀Co₈ quasicrystal with space group P10₅/mmc has been determined on the basis of a single-crystal X-ray data set using the five-dimensional description. The best-fit model structure based on a cluster model having lower symmetry than the decagonal symmetry with 103 parameters gives wR = 0.045 and R = 0.063 for 449 reflections. The structure is well described by the hexagon, boat and star tiling with an edge length of 6.36 Å and is very consistent with recent high-resolution electron-microscopy images. The refined structure is compared with previously discussed model structures including cluster-based models having 20 Å tenfold symmetric clusters.

Original language	English
Pages (from-to)	576-585
Number of pages	10
Journal	Acta Crystallographica Section A: Foundations of Crystallography
Volume	57
Issue number	5
DOIs	https://doi.org/10.1107/S0108767301007942
Publication status	Published - 2001 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Structural Biology

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abstract = "The structure of a decagonal Al72Ni20Co8 quasicrystal with space group P105/mmc has been determined on the basis of a single-crystal X-ray data set using the five-dimensional description. The best-fit model structure based on a cluster model having lower symmetry than the decagonal symmetry with 103 parameters gives wR = 0.045 and R = 0.063 for 449 reflections. The structure is well described by the hexagon, boat and star tiling with an edge length of 6.36 {\AA} and is very consistent with recent high-resolution electron-microscopy images. The refined structure is compared with previously discussed model structures including cluster-based models having 20 {\AA} tenfold symmetric clusters.",

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AB - The structure of a decagonal Al72Ni20Co8 quasicrystal with space group P105/mmc has been determined on the basis of a single-crystal X-ray data set using the five-dimensional description. The best-fit model structure based on a cluster model having lower symmetry than the decagonal symmetry with 103 parameters gives wR = 0.045 and R = 0.063 for 449 reflections. The structure is well described by the hexagon, boat and star tiling with an edge length of 6.36 Å and is very consistent with recent high-resolution electron-microscopy images. The refined structure is compared with previously discussed model structures including cluster-based models having 20 Å tenfold symmetric clusters.

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The structure of a decagonal Al₇₂Ni₂₀Co₈quasicrystal

Abstract

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