The frequency dependences of the relaxation times of NMR spin echo signals
of quadrupole nuclei Cr-53 at t(e) = tau and t(e) = 3 tau in ferromagnetic
semiconductor Cd0.985Ag0.015 Cr2Se4 were investigated at temperature 4.2 K.
It was shown that there are two kinds of the quadrupole nuclei Cr-53, whic
h have quite different relaxation times. The existence of two kinds of the
nuclei Cr-53 was connected with doping of the cadmium selenochromite with A
g+ ions.