TY - JOUR
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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U2 - 10.1016/j.jnoncrysol.2003.11.031
DO - 10.1016/j.jnoncrysol.2003.11.031
M3 - Conference article
AN - SCOPUS:17744405838
SN - 0022-3093
VL - 334-335
SP - 156
EP - 160
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
T2 - 8th International Conference on Quasicrystals
Y2 - 8 September 2002 through 13 September 2002
ER -