2(1 x) Sr 2x CdP 2 alloys are shown for 12 different compositions in Figure , ranging from Ba-rich (x = 0.1) to Sr-rich (x = 0.9). We find that the relative position (on the energy axis) of the two low-lying CBs at G and Z changes with x. In the parent compounds, Ba 2 CdP 2 and Sr 2 CdP 2 , the energy separation (DE G Z ) between the two CBs are 0.26 eV and 0.35 eV, respectively (Figure ). The small DE G Z in the parent compounds provides an opportunity to achieve band convergence through al- loying. In the composition range x = 0.0 0.30, the CB dispersion near G and Z closely resemble that of the parent compound, Ba 2 CdP 2 . DE G Z decreases with increasing Sr content, as seen in the regime R1 in Figure (a). In the regime R2, which spans x = 0.35 0.80, we observe convergence of the CBs at G and Z within 30 meV. Interestingly, for x = 0.35 and x = 0.40, the conduction band minima is located at Z, resulting in indirect gap unlike the parents compounds and the other alloy compositions. The 50-50 alloy (x = 0.5) is unique in that the two converged CBs have similar dispersion (Figure ) making it a candidate for optimal composition. However, we know that the 50-50 alloy is expected to be thermodynamically less stable based on the free energy of mixing (Section 2.1). Finally, for compositions with x = 0.8 1.0 in regime R3 (Figure ), DE G Z again increases until it reaches 0.35 eV for the parent compound, Sr 2 CdP 2 . In summary, CB convergence is achieved for compositions x = 0.35 0.70 (regime B in Figure ). We demonstrate with this example how band convergence can be determined through the calculation of EBS.