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Figure 15
[CH7N2]2PbI4 (1937299) showing (a) no tilting of the Pb1 (yellow) and out-of-phase tilting of Pb2 (blue) octahedra around b. (b) Highlights that every third octahedron along the b axis is unique, giving rise to unit cell tripling.

IUCrJ
Volume 8| Part 4| July 2021| Pages 485-513
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521005418