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Figure 9
(a) An example of a Penrose tiling. The arrows show `matching rules': the edges of the rhombs carry an arrow or a double arrow. Tiles may be next to each other when the arrows match along their common edge. (b) The Ammann–Beenker tiling.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 70| Part 4| July 2014| Pages 617-651
doi:10.1107/S2052520614014917
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