The mean alignment-weighted frequency can be calculated with respect to any of the three displacement fields introduced in Section 2. Calculating this metric for the neighboring cation displacement field and relating it to vacancy migration barriers yielded a positive correlation (R 2 = 0.25; Figure ). This finding suggests that accounting for phonon mode alignments yields a more predictive metric than phonon band centers alone. However, the R 2 values for trends among only spinels or anti-perovskites are greater (0.39 and 0.55, respectively), indicating that incorporating additional information could improve correlations further. Nevertheless, the materials in this work with the lowest barriers consistently exhibit the lowest mean alignment-weighted frequencies, suggesting the utility of this metric for screening applications. The alignment-weighted frequency (i.e. ω qν a -1 qν ) for only the mode with the greatest alignment in each material was not significantly correlated (R 2 = 0.04) with migration barriers (Figure ), suggesting that considering quantitative alignment information for all modes is advantageous.