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Figure 20
A series of photographs of a sample of L-alanine immersed in a methanol–ethanol–water mixture in a DAC, showing a sequence of transformations on decompression from 5 GPa to ambient pressure. Top: the sample as viewed in an optical microscope. First a single crystal of L-alanine, then polycrystalline phase 1 (a solvate) and phase 2 (a polymorph of L-alanine) formed on desolvation of phase 1 on decompression. Bottom: powder diffraction patterns collected from different parts of the sample in the left photographs (already converted from the 2D to 1D format with background eliminated). Reproduced with permission of the International Union of Crystallography from Tumanov et al. (2010BB101).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 4| August 2025| Pages 1085-1105
https://doi.org/10.1107/S1600576725004728
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