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Figure 9
Projections of the mixed-layer hexaferrites along the [100] direction highlighting the different stacking sequences. Green and red blocks correspond to M and Y blocks, respectively. The asterisk indicates a class with hexagonal or trigonal symmetry, all others are rhombohedral. For the latter, unit cells contain a threefold repeat of the represented sequences, with subsequent repeats translated in-plane by (2/3, 1/3).

IUCrJ
Volume 5| Part 6| November 2018| Pages 681-698
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518011351