The thermal behaviour of the polynuclear coordination compounds Fe12-xSr(ma
lic) (19-1.5x)]. 18H(2)O and [Fe12-xSr(gluc)(19-1.5x)]. 20H(2)O precursors
of strontium hexaferrite was investigated, and a decomposition mechanism is
proposed. A pure hexaferrite with a mean crystallite size value of about 2
50 Angstrom was obtained after 5 h calcination at 800 degrees C of the gluc
onic precursor (x=1.5).