TY - JOUR
T1 - A unified geometrical framework for face-centered icosahedral approximants in AlPdTM (TM = Transition Metal) systems
AU - Fujita, Nobuhisa
AU - Ogashiwa, Makoto
N1 - Funding Information:
The authors are deeply indebted to An-Pang Tsai for his support and encouragement while working on the present subject. They also gratefully acknowledge Satoshi Ohhashi, Akira Sato, Yoshitaka Matsushita, Masahiko Tanaka, Yoshio Katsuya for their technical supports with SEM and X-ray diffraction. N.F. thanks Marek Mihalkovič for helpful discussions on the CCT framework and atomic decoration schemes. HRPXRD experiments using synchrotron radiation were performed at the BL15XU beamline of SPring-8 under the approval of National Institute for Materials Science (NIMS) (Proposal Nos. 2015A4901, 2016A4900, and 2017A4901). SCXRD experiments were done under the support of NIMS microstructural characterization platform as a program of “Nanotechnology Platform” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The VESTA (Ver. 3) package45) was extensively used for the graphical presentation of structures. This work was financially supported by Japan Science and Technology Agency through PRESTO (Grant No. JPMJPR1519) and Japan Society for the Promotion of Science through Grant-in-Aid for Scientific Research (Grant Nos. 25400354, 18K04677 and JP19H05819).
Publisher Copyright:
© 2020 The Japan Institute of Metals and Materials
PY - 2021/3/1
Y1 - 2021/3/1
N2 - The complex atomic structure of a high-order approximant to face-centered icosahedral quasicrystal in AlPdTM (TM = transition metal) systems can be deconvoluted into two kinds of atomic clusters pinned at the vertices of a tiling composed of four basic polyhedra, called the canonical cells. As a result, thousands of atoms per unit cell can be registered in fifteen orbits associated with vertices, edges, faces, and cells of the relevant canonical-cell tiling. This geometrical framework facilitates a rational guess of an atomic jungle in an unknown approximant structure, could an underlying tiling be postulated. A novel approximant phase in the AlPd(MoFe) system is discussed within the present framework.
AB - The complex atomic structure of a high-order approximant to face-centered icosahedral quasicrystal in AlPdTM (TM = transition metal) systems can be deconvoluted into two kinds of atomic clusters pinned at the vertices of a tiling composed of four basic polyhedra, called the canonical cells. As a result, thousands of atoms per unit cell can be registered in fifteen orbits associated with vertices, edges, faces, and cells of the relevant canonical-cell tiling. This geometrical framework facilitates a rational guess of an atomic jungle in an unknown approximant structure, could an underlying tiling be postulated. A novel approximant phase in the AlPd(MoFe) system is discussed within the present framework.
KW - Approximants
KW - Atomic decoration models
KW - Canonical cell tiling
KW - Icosahedral quasicrystals
KW - Mini-Bergman cluster
KW - Pseudo-mackay cluster
KW - X-ray crystallography
UR - http://www.scopus.com/inward/record.url?scp=85101753105&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85101753105&partnerID=8YFLogxK
U2 - 10.2320/matertrans.MT-MB2020007
DO - 10.2320/matertrans.MT-MB2020007
M3 - Article
AN - SCOPUS:85101753105
SN - 1345-9678
VL - 62
SP - 329
EP - 337
JO - Materials Transactions
JF - Materials Transactions
IS - 3
ER -