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Figure 6
(a) Sequences with overall composition LS (top), L2S (middle) and LτS, i.e. the FS (bottom), with the decomposition into covering clusters of the type (LS) in both orientations. The upper two sequences are rational approximants of the quasiperiodic FS. (b) The overall stoichiometry of the FS, i.e. the ratio of the number of L's to the number of S's, is defined by the slope of the strip. Its width W constrains the maximum stoichiometry fluctuations around the ideal value τ−1.

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ISSN: 2053-2733
Volume 74| Part 1| January 2018| Pages 1-11
https://doi.org/10.1107/S2053273317016540
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