The structure of a decagonal Al72Ni20Co8 quasicrystal with space group P105/mmc has been determined on the basis of a single-crystal X-ray data set using the five-dimensional description. The best-fit model structure based on a cluster model having lower symmetry than the decagonal symmetry with 103 parameters gives wR = 0.045 and R = 0.063 for 449 reflections. The structure is well described by the hexagon, boat and star tiling with an edge length of 6.36 Å and is very consistent with recent high-resolution electron-microscopy images. The refined structure is compared with previously discussed model structures including cluster-based models having 20 Å tenfold symmetric clusters.
|Number of pages||10|
|Journal||Acta Crystallographica Section A: Foundations of Crystallography|
|Publication status||Published - 2001 Jan 1|
ASJC Scopus subject areas
- Structural Biology