To build this model, we first generate a large set of AIMD simulations using a melt-quench technique which span a range of initial conditions (densities, equilibration temperatures, and rate of equilibration) as outlined in Fig. Structure Generation. For each set of initial conditions, the AIMD simulations are repeated from different starting structures, thereby exploring additional local structural orderings. From these simulations, the static configurations from the final equilibrated 1000 timesteps of each simulation are considered. For the a-Al2O3 model, we generated 18 initial conditions, with 3 starting structures of 120 atoms each to generate a total of 54,000 static configurations. We simulated a-Al2O3 at densities of 3.18, 3.30, and 3.42 g/cm 3 , equilibration temperatures or 300, 600, and 900 K, and using rates of equilibration which we refer to as a 'cooling' and 'quenching' scheme (the combination of these parameters resulting in 18 distinct initial conditions).