Mixed selenide spinels of (Cd)[Cr1.81In0.19]Se-4 and (Cd(0.745)ln(0.255))[Cr(1.94)ln(0.06)]Se-4 have been studied using X-ray diffraction, magnetic measurements and ESR spectroscopy. In3+ ions accommodate both tetrahedral and octahedral sites in the spinel structure. The magnetic short-range order appears in the critical region from T-c to about 200 K for the selenide spinels. The linear temperature dependence of the resonance linewidth at T > 250 K is interpreted by an occurrence of one-phonon process in a spin-lattice relaxation. (c) 2006 Elsevier B.V. All rights reserved.