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Figure 5
(a) Temperature evolution of (I) – phase transformation of (I) to (III) at ca 150°C. (b) X-ray powder diffraction patterns of (I), (II) and (III) (at room temperature), SC – simulated pattern from single-crystal X-ray diffraction. (c) Comparison between form (I) at 25°C, which was then transformed to (III) at 150°C and finally to (IIa) at ca 200°C. (d) Scheme of the phase transition between the polymorphs.

IUCrJ
Volume 6| Part 2| March 2019| Pages 226-237
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518017037