Technical Comments

Comment on "Decagonal and Quasi-Crystalline Tilings in Medieval Islamic Architecture"

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Science  30 Nov 2007:
Vol. 318, Issue 5855, pp. 1383
DOI: 10.1126/science.1146262

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Lu and Steinhardt (Reports, 23 February 2007, p. 1106) claimed the discovery of a large, potentially quasi-crystalline Islamic tiling in the Darb-i Imam shrine but regard the earlier Maragha tiling, previously described as quasiperiodic, as a small isolated motif. We demonstrate that the Darb-i Imam pattern is periodic and that the quasi-crystalline discs superimposed on its lattice are derivatives of the Maragha pattern.

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