Recombination radiation is observed in vitreous and crystalline CdGeP2. Some electric properties of vitreous and crystalline specimens are also studied. n‐ and p‐type crystals with concentrations n = 6 × 1010 to 7 × 1015 cm−3 and p = 7 × 1014 to 4 × 1015 cm−3 at 300 °K and p‐type vitreous CdGeP2 are used. The effect of the recrystallisation of vitreous CdGeP2 as well as the effect of impurities on the recombination radiation of crystalline CdGeP2 is investigated.