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Figure 8
Arrangement of the (As2S5)4− groups (represented as vertex-sharing trigonal pyramids) within a portion of size 2a × 2b × 5c unit cells. (a) Average disordered structure, both orientations of the disordered pyramids are possible at every position. (b) A portion of the incommensurately modulated structure of size 2a × 2b × 5c unit cells. The differently coloured (As2S5)4− groups correspond to configurations where the two different As positions are alternatively occupied, showing pyramids pointing up or down with respect to the plane of the picture.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 75| Part 4| August 2019| Pages 711-716
https://doi.org/10.1107/S2052520619007340
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