Thermal behaviour of iron(lll) oxide hydroxides

Abstract

Two iron(III) oxide hydroxides, namely α-FeOOH (goethite) and FeOOH (lepidocrocite), were studied by means of Differential Thermal Analysis (DTA), Thermogravimetry (TG) and Emanation Thermal Analysis (ETA) on heating in air. Surface area, Transmission Electron Microscopy (TEM) and X-ray diffraction patterns (XRD) were used for the characterization of the intermediate products of the thermal treatment. ETA enabled us to obtain a new sensitive insight into the aggregation processes of solid particles. © 1995 IUPAC