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Figure 3
(a) A 〈110〉 zone-axis EDP typical of the (3+3)-dimensional incommensurately modulated (1−x)Bi2O3·xNb2O5 (0.06 ≤ x ≤ 0.25) solid-solution phase for x = 0.2 [see Ling et al. (1998BB27, 2013BB26) for details]. (b) An optical micrograph of the perfect dodecahedral symmetry of the millimetre-sized single icosahedral quasicrystal Ho8.7Mg34.6Zn56.8 [see Fisher et al. (1998BB12); micrograph courtesy of I. R. Fisher].

IUCrJ
Volume 2| Part 1| January 2015| Pages 74-84
ISSN: 2052-2525
doi:10.1107/S2052252514022556