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Figure 4
A δ-CPA molecule with the atom-numbering scheme (a), the δ-CPA crystal structure at ambient pressure in the bc plane (b) and a model of the δ′′HP commensurately modulated structure at 3.70 (5) GPa (c). Structural models were built based on BM01 (ESRF) data sets. Polymorphs β, γ, δ and ɛ are metastable (Drebushchak, Drebushchak, Chukanov & Boldyreva, 2008View full citation).

IUCrJ
Volume 13| Part 2| March 2026| Pages 146-158
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525011601