Crossluminescence (CL) of ionic crystals is regarded with the account
for the many-body effects. The crossluminescence yield in the pre-thre
shold region is considered on the basis of Fano interaction. Relaxatio
n of the doubly-ionised 5p state of the cation ion as manifested in th
e CL and STE excitation spectra in the region of 4d core-hole creation
is discussed. The effects of CL quenching are briefly reviewed.