Abstract
The study of spectral and decay parameters of self-trapped exciton emission in crystals NaMgF3, KMgF3, RbMgF3, CsMgF3, KMgCl3 KCaCl3, and RbCaCl3 is carried out. It is established that in all crystals the intrinsic luminescence contains spectrally-unresolved fast (nanoseconds) and slow (about 1 μs) components.