Table : Comparison of the electronic structure properties of 100-and 200-atom SQS supercells of Ba 0.4 Sr 1.6 CdP 2 (x = 0.8). The band gap (E g ), valence band density-of-states e↵ective mass (m ⇤ DOS,VB ), and conduction band density-of-states e↵ective mass(m ⇤ DOS,CB ) are found to be su ciently converged for the 100-atom SQS. E g , m ⇤ DOS,VB , and m ⇤ DOS,CB are calculated from the e↵ective band structures. The DOS e↵ective mass is calculated within a 100 meV energy window from the relevant band edges, following the methodology reported in our previous works.