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Figure 7
Crystal structures of (C6H5CH2NH3)2PbCl4 at 453 K (left) and 295 K (right). Views of the high-temperature centrosymmetric structure include (a) the unit cell as viewed parallel to the inorganic layers; (b) a top-down view of a single inorganic layer, where the benzyl groups of the organic cation have been omitted for clarity; and (c) the Pb-centered octahedron. Comparable views of the low-temperature polar structure are shown in (d), (e) and (f), with strong hydrogen bonds denoted by dashed lines in (d). The axes shown refer to the standard setting of these two space groups.

IUCrJ
Volume 10| Part 4| July 2023| Pages 385-396
ISSN: 2052-2525
https://doi.org/10.1107/S2052252523003743