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Figure 5
Characteristics of the solid-state phase transitions of linear-chain racemic and quasi-racemic amino acids: (a) transition temperatures of the racemates up to a chain length of 20 carbon atoms, and quasi-racemates up to a chain length of 8 carbon atoms; (b) hysteresis; and (c) transition volume changes versus the number of carbon atoms per molecule. The dotted lines are guides to the eye. For the quasi-racemates (all with Δn = 1) the average chain length was used, i.e. 5.5 for D-Nva-L-Nle. All structures involving Met are on the right-hand side of the graph.

IUCrJ
Volume 7| Part 2| March 2020| Pages 331-341
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520001335