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Perovskite-type LaSrMO4 (M = Mn, Fe, Co, Ni, Cu) mixed oxides were prepared by the decomposition of amorphous citric and ethylenediaminetetraacetic acid complexes and investigated by the XRD, FTIR, BET, TPR, TPD and XPSmethods. Their catalytic behavior in the total oxidation of hexane was examined. The following activity order was found LaSrCoO4 > LaSrNiO4 > LaSrCuO4 > LaSrFeO4 > LaSrMnO4. This is explained in terms of oxygen vacancies and mobile lattice oxygen, particle size and BET surface area.