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Figure 9
(a) AS A, Al subregions. Numbered, pale grey, the subregions in one asymmetric unit. The overlaid polygons marked with G4 and G2 are copies of the AS of Fig. 2[link], centred in the origin of the unit cell. This AS is the locus of the centres of 20 Å Gummelt decagons. The overlapping portions of AS A correspond to atoms located at a fixed physical space distance from the centre of one Gummelt decagon. This distance is ar = 2.43 Å for G4 and [\tau^{2} a_r] = 6.37 Å for G2. Note how different clusters would have different decoration in the respective circles. (b) AS A, TM subregions. Same description. (c) AS B, Al subregions. Same description. Polygons G1 and G3 correspond to distances of [\tau^{-1} a_r] = 1.50 Å and [\tau a_r] = 3.94 Å, respectively. (d) AS B, TM subregions. Same description.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 58| Part 1| February 2002| Pages 8-33
https://doi.org/10.1107/S0108768101018936
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