TY - JOUR
T1 - Atom cluster arrangements in cubic approximant phases of icosahedral quasicrystals
AU - Hiraga, Kenji
AU - Sugiyama, Kazumasa
AU - Ohsuna, Tetsu
N1 - Funding Information:
ACKNOWLEDGMENTS This contribution is dedicated to Hans-Ude Nissen on the occasion of his 65th birthday. This work has been supported by a Grant-in-Aid for Scientific Research (A) (No. 08404021), and by a Grant-in-Aid for Scientific Research on Priority Areas ‘Phase Transformation’ (No. 09242102) from the Ministry of Education and Culture of Japan, and also by CREST of Japan Science and Technology Corporation.
PY - 1998/11
Y1 - 1998/11
N2 - Structural characteristics of six cubic approximant phases, α -(AlPdMnSi), P-(AlPdMnSi), y-(AlCuRuSi), (Al, Zn)49Mg32, α -(AlMnSi) and All2Mn, of icosa¬hedral quasicrystals are discussed systematically in terms of atom cluster arrangements. The structures of those approximants can be classified into two groups: firstly, that characterized as a simple-cubic packing of atom clusters with icosahedral symmetry or a ‘CsCl’-type packing of two types of atom clusters, and, secondly, a body-centred packing of one type of atom cluster with icosahedral symmetry. The former, α -(AlPdMnSi), β -(AlPdMnSi) and γ -(AlCuRuSi), is suggested to be approximant phases of F-type icosahedral phases, and the latter, (Al, Zn)49Mg32, α -(AlMnSi) and Al)12Mn, to be those of P-type icosa¬hedral phases. Atomic arrangements of the atom clusters with icosahedral symmetry in the approximant phases are characterized by the existence of a fundamental icosahedral cluster and are classified into two groups by the manner of the packing of atoms on the fundamental icosahedral cluster: namely, the so-called octahedral (α -(AlMnSi) and Al12Mn) and tetrahedral (α-(AlPdMnSi), (β-(AlPdMnSi), γ-(AlCuRuSi) and (Al, Zn)49Mg32) packings.
AB - Structural characteristics of six cubic approximant phases, α -(AlPdMnSi), P-(AlPdMnSi), y-(AlCuRuSi), (Al, Zn)49Mg32, α -(AlMnSi) and All2Mn, of icosa¬hedral quasicrystals are discussed systematically in terms of atom cluster arrangements. The structures of those approximants can be classified into two groups: firstly, that characterized as a simple-cubic packing of atom clusters with icosahedral symmetry or a ‘CsCl’-type packing of two types of atom clusters, and, secondly, a body-centred packing of one type of atom cluster with icosahedral symmetry. The former, α -(AlPdMnSi), β -(AlPdMnSi) and γ -(AlCuRuSi), is suggested to be approximant phases of F-type icosahedral phases, and the latter, (Al, Zn)49Mg32, α -(AlMnSi) and Al)12Mn, to be those of P-type icosa¬hedral phases. Atomic arrangements of the atom clusters with icosahedral symmetry in the approximant phases are characterized by the existence of a fundamental icosahedral cluster and are classified into two groups by the manner of the packing of atoms on the fundamental icosahedral cluster: namely, the so-called octahedral (α -(AlMnSi) and Al12Mn) and tetrahedral (α-(AlPdMnSi), (β-(AlPdMnSi), γ-(AlCuRuSi) and (Al, Zn)49Mg32) packings.
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U2 - 10.1080/01418619808239973
DO - 10.1080/01418619808239973
M3 - Article
AN - SCOPUS:0039494908
SN - 0141-8610
VL - 78
SP - 1051
EP - 1064
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 5
ER -