Probele cristaline de CdIn2O4 şi CdGa2O4 de singonie cubică au fost preparate printr-o metodă similară celei aplicate la prepararea materialelor ceramice. Spectrele de fotoluminescenţă au fost măsurate la temperatura 77 şi 300 K sub influenţa excitaţiei laserului de argon. Ele constau din benzi intensive înguste roşii, generate datorită recombinării.

Crystalline samples of CdIn2O4 and CdGa2O4 of cubic syngony have been prepared using a method similar to that commonly used for preparation of ceramic materials. Photoluminescence spectra measured at temperature 77 and 300 K under Ar laser excitation consist of intensive narrow red bands generated due to recombination involving centers defined by the intrinsic defect structure.