The aim of the present study was to determine the kinetic equations for the thermal transformations of precipitated iron oxides
and hydroxides, namely for the process of thermal dehydroxylation of goethite and consecutive of hematite crystal structure
growth as well as for the oxidation of magnetite to maghemite and its thermal transformation into crystalline hematite. The
investigations have been carried out using thermogravimetry (TG/DTG/DTA), X-ray powder diffractometry (XRD) and high temperature
powder diffractometry (HT-XRD). This presentation contains the continuation of our earlier works.