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Luminescent and radiation properties of a series of heavy-element crys
tals based on CdF2, BaF2, LaF3, Pb0.67Cd0.33F2, Na0.4Yb0.6F22, Y3Al5O1
2 and a lead glass Phi-113 are presented. Our investigation shows that
the crystals based on CdF2 containing YbF3 and InF3 have radiation re
sistance greater than or equal to 10 Mrad.