Nickel-zinc ferrites have been synthesized via thermal decomposition of polynuclear coordination compounds containing as ligand the anion of malic acid, namely (NH4)[Fe(2)NixZn(1-x)(C4H4O5)(OH)(3)]center dot nH(2)O (x =0.25, 0.5 and 0.75, n=3 and 5). A comparison between the thermal behaviour of the studied polynuclear coordination compounds is inferred. Fe(2)NixZn(1-x)O(4) (n=0.25, 0.5 and 0.75) ferrites with mean particle sizes of 65-85 angstrom and free from other phases are formed after a heating treatment of only one hour at 500 degrees C.
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