TY - JOUR
T1 - The crystal stucture of a γ-(Al-Cu-Ru-Si) cubic phase
T2 - A new approximant phase for the Al-Cu-Ru icosahedral quasicrystal
AU - Sugiyama, Kazumasa
AU - Kato, Takeshi
AU - Saito, Kaichi
AU - Hiraga, Kenji
PY - 1998/1/1
Y1 - 1998/1/1
N2 - The crystal structure of a γ-(Al-Cu-Ru-Si) cubic phase (Al55.1Cu14.6Ru20.2Si10.1), considered to be closely related to that of the Al-Cu-Ru icosahedral quasicrystal, has been determined by single-crystal X-raydiffraction. The atomic model, refined to a final R value of 0.0346, has about262 atoms with an atomic ratio of Al66.3Cu13.5Ru19.8in a cubic unit cell with alattice constant a = 1.538 0(2) nm and the space group Fm3. The fundamentalstructure is characterized by a sc arrangement of dodecahedral atom clusters withan interval of 0.77nm, which corresponds to a lattice constant of a 1/0 cubicapproximant phase for the icosahedral quasicrystals. The chemical ordering ofthe constituents in the dodecahedral cluster produces a superstructure with alattice constant twice that of a 1/0 cubic approximant phase.
AB - The crystal structure of a γ-(Al-Cu-Ru-Si) cubic phase (Al55.1Cu14.6Ru20.2Si10.1), considered to be closely related to that of the Al-Cu-Ru icosahedral quasicrystal, has been determined by single-crystal X-raydiffraction. The atomic model, refined to a final R value of 0.0346, has about262 atoms with an atomic ratio of Al66.3Cu13.5Ru19.8in a cubic unit cell with alattice constant a = 1.538 0(2) nm and the space group Fm3. The fundamentalstructure is characterized by a sc arrangement of dodecahedral atom clusters withan interval of 0.77nm, which corresponds to a lattice constant of a 1/0 cubicapproximant phase for the icosahedral quasicrystals. The chemical ordering ofthe constituents in the dodecahedral cluster produces a superstructure with alattice constant twice that of a 1/0 cubic approximant phase.
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U2 - 10.1080/095008398178615
DO - 10.1080/095008398178615
M3 - Article
AN - SCOPUS:0032019622
VL - 77
SP - 165
EP - 171
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
SN - 0950-0839
IS - 3
ER -