Generalized Penrose tiling as a quasilattice for decagonal quasicrystal structure analysis.
The generalized Penrose tiling is, in fact, an infinite set of decagonal tilings. It is constructed with the same rhombs (thick and thin) as the conventional Penrose tiling, but its long-range order depends on the so-called shift parameter (s ∈ 〈0; 1)). The structure factor is derived for the arbitrarily decorated generalized Penrose tiling within the average unit cell approach. The final formula works in physical space only and is directly dependent on the s parameter. It allows one to straightforwardly change the long-range order of the refined structure just by changing the s parameter and keeping the tile decoration unchanged. This gives a great advantage over the higher-dimensional method, where every change of the tiling (change in the s parameter) requires the structure model to be built from scratch, i.e. the fine division of the atomic surfaces has to be redone.
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, Krakow, Poland.
Maciej
M
Chodyn
Laboratory of Crystallography, ETH Zurich, Wolfgang-Pauli-Strasse 10, Zurich, CH-8093, Switzerland.
Pawel
P
Kuczera
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, Krakow, Poland.
Janusz
J
Wolny
average unit cell; decagonal quasicrystals; generalized Penrose tiling