TY - JOUR
T1 - Crystal structure of a hexagonal phase and its relation to a quasicrystalline phase in Zn-Mg-Y alloy
AU - Takakura, H.
AU - Sato, A.
AU - Yamamoto, A.
AU - Tsai, A. P.
PY - 1998
Y1 - 1998
N2 - The crystal structure of a Zn-Mg-Y hexagonal phase, considered to be related to that of the quasicrystalline phase, has been determined by single-crystal X-ray diffraction. The atomic model, refined to a final R value of 0.027, has the composition Zn65.22Mg27.92Y6.86 and 92 atoms in a unit cell with lattice constants a = 14.579(2) Å and c = 8.687(1) À and the space group P63/mmc. The Y atoms are situated at two different sites; one is fully occupied by Y atoms, while the other is shared with Mg atoms. The structure can be characterized by a layer structure stacked along the c axis, and also viewed as a columnar structure composed of fused Friauf polyhedras sharing hexagonal rings. The similarity of this hexagonal phase to the MgZn2 phase is shown. The structural relationship between this hexagonal phase and the icosahedral phase is also discussed.
AB - The crystal structure of a Zn-Mg-Y hexagonal phase, considered to be related to that of the quasicrystalline phase, has been determined by single-crystal X-ray diffraction. The atomic model, refined to a final R value of 0.027, has the composition Zn65.22Mg27.92Y6.86 and 92 atoms in a unit cell with lattice constants a = 14.579(2) Å and c = 8.687(1) À and the space group P63/mmc. The Y atoms are situated at two different sites; one is fully occupied by Y atoms, while the other is shared with Mg atoms. The structure can be characterized by a layer structure stacked along the c axis, and also viewed as a columnar structure composed of fused Friauf polyhedras sharing hexagonal rings. The similarity of this hexagonal phase to the MgZn2 phase is shown. The structural relationship between this hexagonal phase and the icosahedral phase is also discussed.
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U2 - 10.1080/095008398178020
DO - 10.1080/095008398178020
M3 - Article
AN - SCOPUS:0032164467
SN - 0950-0839
VL - 78
SP - 263
EP - 270
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
IS - 3
ER -