Fig. 5.

Using temperature as a stimulus to access the metastable cp/lp coexistence regions in MIL-53(Al)-F. a Free energy and c pressure equations of state at 100 K, 300 K, and 500 K, with b indication of the metastable ($n_{\mathrm{cp}}$,$n_{\mathrm{lp}}$) phase coexistence regions as a function of the volume for an 8 × 2 × 8 mesocell of MIL-53(Al)-F. The different (meta)stable states and transition states are indicated on the free energy equations of state with (open) circles and crosses, respectively. d The material’s response upon two different temperature treatments is predicted: a constant-temperature treatment (green) and a temperature quenching treatment (blue), demonstrating how the latter leads to a stabilized (4,4) phase coexistence