Crystal structure of a 2/1 cubic approximant in an Al-Rh-Si alloy

K. Sugiyama; W. Sun; K. Hiraga

doi:10.1016/j.jnoncrysol.2003.11.031

Crystal structure of a 2/1 cubic approximant in an Al-Rh-Si alloy

K. Sugiyama, W. Sun, K. Hiraga

Research output: Contribution to journal › Conference article › peer-review

7 Citations (Scopus)

Abstract

The structure of a cubic Al_66.5Rh_26.1Si _7.3 phase, which is referred as a 2/1 approximant for an icosahedral phase, was determined by means of single crystal X-ray structural analysis: space group Pm3, a = 19.935(2) Å, Mo Kα (λ = 0.71069 Å); refined as Al_70.4Rh_29.6, R(wR2) = 0.087(0.194) for 1391 reflections with I > 2.0σ(I). A dodecahedral atom cluster is located at the origin of a unit cell, and the corresponding atomic arrangement can be described as nine shells with a local icosahedral symmetry, by suggesting a close similarity to the dodecahedral atomic cluster of the 2/1-AlPdMnSi approximant. The 2/1-AlRhSi approximant is a second example of a simple cubic arrangement of dodecahedral atom clusters that are 20 Å in diameter.

Original language	English
Pages (from-to)	156-160
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	334-335
DOIs	https://doi.org/10.1016/j.jnoncrysol.2003.11.031
Publication status	Published - 2004 Mar 15
Externally published	Yes
Event	8th International Conference on Quasicrystals - Bangalore, India Duration: 2002 Sep 8 → 2002 Sep 13

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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title = "Crystal structure of a 2/1 cubic approximant in an Al-Rh-Si alloy",

abstract = "The structure of a cubic Al66.5Rh26.1Si 7.3 phase, which is referred as a 2/1 approximant for an icosahedral phase, was determined by means of single crystal X-ray structural analysis: space group Pm3, a = 19.935(2) {\AA}, Mo Kα (λ = 0.71069 {\AA}); refined as Al70.4Rh29.6, R(wR2) = 0.087(0.194) for 1391 reflections with I > 2.0σ(I). A dodecahedral atom cluster is located at the origin of a unit cell, and the corresponding atomic arrangement can be described as nine shells with a local icosahedral symmetry, by suggesting a close similarity to the dodecahedral atomic cluster of the 2/1-AlPdMnSi approximant. The 2/1-AlRhSi approximant is a second example of a simple cubic arrangement of dodecahedral atom clusters that are 20 {\AA} in diameter.",

author = "K. Sugiyama and W. Sun and K. Hiraga",

note = "Funding Information: This work was carried out as part of a research project, financially supported by a Grant-in-Aid for Scientific Research (B) (No. 12450257) from the Ministry of Education, Science and Culture of Japan.; 8th International Conference on Quasicrystals ; Conference date: 08-09-2002 Through 13-09-2002",

year = "2004",

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doi = "10.1016/j.jnoncrysol.2003.11.031",

language = "English",

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T1 - Crystal structure of a 2/1 cubic approximant in an Al-Rh-Si alloy

AU - Sugiyama, K.

AU - Sun, W.

AU - Hiraga, K.

N1 - Funding Information: This work was carried out as part of a research project, financially supported by a Grant-in-Aid for Scientific Research (B) (No. 12450257) from the Ministry of Education, Science and Culture of Japan.

PY - 2004/3/15

Y1 - 2004/3/15

N2 - The structure of a cubic Al66.5Rh26.1Si 7.3 phase, which is referred as a 2/1 approximant for an icosahedral phase, was determined by means of single crystal X-ray structural analysis: space group Pm3, a = 19.935(2) Å, Mo Kα (λ = 0.71069 Å); refined as Al70.4Rh29.6, R(wR2) = 0.087(0.194) for 1391 reflections with I > 2.0σ(I). A dodecahedral atom cluster is located at the origin of a unit cell, and the corresponding atomic arrangement can be described as nine shells with a local icosahedral symmetry, by suggesting a close similarity to the dodecahedral atomic cluster of the 2/1-AlPdMnSi approximant. The 2/1-AlRhSi approximant is a second example of a simple cubic arrangement of dodecahedral atom clusters that are 20 Å in diameter.

AB - The structure of a cubic Al66.5Rh26.1Si 7.3 phase, which is referred as a 2/1 approximant for an icosahedral phase, was determined by means of single crystal X-ray structural analysis: space group Pm3, a = 19.935(2) Å, Mo Kα (λ = 0.71069 Å); refined as Al70.4Rh29.6, R(wR2) = 0.087(0.194) for 1391 reflections with I > 2.0σ(I). A dodecahedral atom cluster is located at the origin of a unit cell, and the corresponding atomic arrangement can be described as nine shells with a local icosahedral symmetry, by suggesting a close similarity to the dodecahedral atomic cluster of the 2/1-AlPdMnSi approximant. The 2/1-AlRhSi approximant is a second example of a simple cubic arrangement of dodecahedral atom clusters that are 20 Å in diameter.

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DO - 10.1016/j.jnoncrysol.2003.11.031

M3 - Conference article

AN - SCOPUS:17744405838

VL - 334-335

SP - 156

EP - 160

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

T2 - 8th International Conference on Quasicrystals

Y2 - 8 September 2002 through 13 September 2002

ER -

Crystal structure of a 2/1 cubic approximant in an Al-Rh-Si alloy

Abstract

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