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Figure 5
(a) Optical micrographs showing rapid conversion (desolvation) of the freshly crystallized 2.5 hydrate to dihydrate E, and (b) crystal structure views of the parent 2.5 hydrate [CSD refcode: AQOMEY02] and product dihydrate E. With minimal change to the unit-cell dimensions upon dehydration of the 2.5 hydrate, voids (shown in light blue) are created in dihydrate E, where 0.5 molar equivalents of water were lost below 75% RH.

IUCrJ
Volume 7| Part 6| November 2020| Pages 955-964
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520012683