In this work, we followed the same general melt-quenching procedure with small adaptations. Using the ReaxFF force field, an initial crystalline structure was prepared and heated up to 300 K, allowing us to measure the properties of the ZIF in its crystalline phase. Then, the system was melted by heating it up to a maximal temperature (well above the melting point). The produced liquid was then quenched to room temperature, transitioning into the glass state. Finally, the system was equilibrated, and its structural and dynamic properties were calculated. Both the melt-quenching and the equilibration were performed in the constant-pressure (N, P, T ) ensemble to be able to capture changes in density during the formation. The four steps of this procedure are represented on Figure . ReaxFF, consisting of preparation (orange), melting (red), quenching (green) and equilibration (blue). Plateaux are present to collect statistics during melt-quenching. For clarity, only the start of the equilibration is shown, and a moving average over 250 fs is used. An enlarged plot of the preparation is presented on Figure .