Substituted CdCr2S4spinels containing Ni, Co, V, and Ti were prepared for magnetic study. Substitution of In3+for Cd2+was used for charge compensation when divalent transition‐metal ions were substituted for Cr3+. In the spinels Cd0.8In0.2[Cr1.8Ni0.2]S4, Cd0.8In0.2[Cr1.8Co0.2]S4and Cd0.8In0.2[Co0.2Cr1.8]Se4the Ni2+and Co2+were both found (by magnetic measurements) to interact negatively (antiferromagnetically) with the Cr3+ion. The V3+and Ti3+ions in CdV0.2Cr1.8S4and CdTi0.2Cr1.8S4appear to have no magnetic moment. The measured magnetic moments of these spinels are in excellent agreement with theoretical values based only on the moment of Cr3+. In the compound Cd0.8In0.2[Cr1.8V0.2]S4the measurements indicated that the V2+ion is not stable with respect to the Cr2+ion. The resulting ionic distribution would be Cd0.8In0.2[V0.23+Cr0.22+Cr1.63+]S4instead of Cd0.8In0.2[V0.22+Cr1.83+] S4. Two additional compositions containing 0.1 and 0.3 mole of vanadium exhibited magnetic moments which are consistent with the formation of V3+and Cr2+.