The complete sets of dielectric, elastic, and piezoelectric constants of Cs_(2)TeMo_(3)O_(12) crystals at room temperature were determined by means of the resonant technique and impedance analysis. The piezoelectric strain constants d_(33) and d_(15) were on the order of 20.3 and 29.2 pC/N, respectively, with the electromechanical coupling coefficients being k_(33) velence 36.6percent and k_(15) velence 14.3percent. Moreover, temperature dependence of the electro-elastic coefficients was measured in the range of 0-150 deg C, where the elastic constant s_(44) was found to possess relatively low temperature coefficient (Ts_(44)~(1) velence 77 X 10~(-6)/deg C), and the variations of d_(33) and k_(33) were less than 3.5percent and 1.0percent, respectively.
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