TY - JOUR
T1 - The structure of a frank-kasper decagonal quasicrystal in the Zn-Mg-Dy system
T2 - Comparison with the Al-Ni-Co system
AU - Abe, E.
AU - Sato, T. J.
AU - Tsai, A. P.
PY - 1998/4
Y1 - 1998/4
N2 - The structure of a new decagonal quasicrystal in the Zn-Mg-Dy system has been studied by transmission electron microscopy and compared with that of a decagonal Al-Ni-Co (d-(Al-Ni-Co)) phase with primitive structure. Electron diffraction patterns of these two d phases reveal the same appearance of the Bragg reflections but with different unit lengths. The characteristic length, in and normal to the quasiperiodic plane, are a = 0.227 nm and c = 0.255nm for d-(Zn-Mg-Dy), and a = 0.20 nm and c = 0.20 nm for d-(Al-Ni-Co); the c/a ratios are therefore also different. The local atomic arrangement of the d-(Zn-Mg-Dy) is proposed to be a tetrahedrally close-packed structure.
AB - The structure of a new decagonal quasicrystal in the Zn-Mg-Dy system has been studied by transmission electron microscopy and compared with that of a decagonal Al-Ni-Co (d-(Al-Ni-Co)) phase with primitive structure. Electron diffraction patterns of these two d phases reveal the same appearance of the Bragg reflections but with different unit lengths. The characteristic length, in and normal to the quasiperiodic plane, are a = 0.227 nm and c = 0.255nm for d-(Zn-Mg-Dy), and a = 0.20 nm and c = 0.20 nm for d-(Al-Ni-Co); the c/a ratios are therefore also different. The local atomic arrangement of the d-(Zn-Mg-Dy) is proposed to be a tetrahedrally close-packed structure.
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U2 - 10.1080/095008398178525
DO - 10.1080/095008398178525
M3 - Article
AN - SCOPUS:0032042847
SN - 0950-0839
VL - 77
SP - 205
EP - 211
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
IS - 4
ER -