  Scintillation properties of $({\rm Zn}_{0.9} {\rm Pb}_{0.1})({\rm W}_{0.9}
{\rm Mo}_{0.1}){\rm O}_4$ and $({\rm Zn}_{0.9} {\rm Cd}_{0.1})({\rm W}_{0.9}
{\rm Mo}_{0.1}){\rm O}_4$ mixed crystals with doping of ${\rm Eu, Sm, Pr, Ce,
Sc, Yt}$ and ${\rm Nb}$ are studied. Measurements of their light yields
relative to pure ${\rm ZnWO}_4$ at room temperature, decay times and energy
resolutions at 662 keV are presented. Emission spectra are obtained with
${}^{239}Pu$ source of alpha particles.

Instrumentation and Detectors