Chromium and manganese co-substituted spinel magnesioferrites of the composition Mg 1−x Mn x Fe 2−2x Cr 2x O 4 (x=0.0, 0.1, 0.2, 0.3, and 0.5) were investigated with X-ray diffraction (XRD), Mössbauer spectroscopy and magnetic measurements. The cation distribution inferred suggests that Mn 2+ and Cr 3+ ions dominantly occupy the A-and Bsites respectively. The gradual decrease of the hyperfine fields and Curie temperatures with increasing x reflects a gradual weakening in the AB exchange interaction. Mössbauer data of the sample with x=0.5 is suggestive of cation clustering and/or superparamagnetism. The magnetization data is suggestive of Yafet-Kittel-type canted magnetism.