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A non-thermal route to oxide nanocomposites by mechanochemical redox reactions in the α-Fe2O3 + SnO system is presented. The important impact of the work, from the methodology point of view, is the combined application of 57Fe and 119Sn Mössbauer spectroscopies to the study of the mechanically induced redox processes, resulting in the reduction of α-Fe2O3 and the oxidation of SnO. In addition, the...