[en] The x-ray stimulated luminescence of magnesium aluminate spinel of different composition was investigated.It was shown,that luminescence properties and charge transfer in crystals are attributed to the centers on antisite defects.Due to high concentration (up to 5 centre dot 10²¹ cm^-3) of this type defects they determine kinetic not only luminescence on antisite defects but on impurities also.Because of strong temperature dependence of luminescence intensities and temporal characteristics it is possible to use this material as optical windows in CTNR devices under chosen temperature condition