Temperature and frequency dependences of the dielectric dispersion in
the mixed crystal system KBr1-x(NO2)(x) (a = 0.06, 0.11, 0.26 and 0.36
) were measured in the frequency range between 100 Hz and 10 MHz. The
non-Debye type dielectric dispersions below 100 K for all the concentr
ations were observed. On the basis of the result of the dielectric dis
persion measured in these crystals, pie discussed the glassy phase tra
nsition in this crystal system.