Addition of element-wise max lattice plane density as machine learning features improved the machine learning results relative to training only on elemental presence (Figure ). The R 2 fit improved from 0.600 ± 0.031 to 0.673 ± 0.029. Mathematica's built-in Predict function was used. Predictions of bulk modulus using only elemental presence are summarized in Figure to facilitate comparison with the machine learning model which incorporated element-wise max lattice plane densities.