The thermal decomposition in dynamic oxidative atmosphere of the new homopolynuclear coordination compound [Fe(C2O4)(OH)(OH2)](n)center dot 0.3nH(2)O was investigated by simultaneously using TG, DTG and DTA techniques. Solid-state decomposition products formed during heating at different temperatures (350 degrees C, 800 degrees C and 1000 degrees C) were analyzed by physical-chemical methods, including electronic spectroscopy (diffuse reflectance technique), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD analysis data show that the final decomposition product, namely hematite (alpha-Fe2O3), is relatively well crystallized, while SEM images reveal that the particles exhibit irregular forms, their size being widely distributed between 6 nm and 4 mu m. (C) 2015 Elsevier B.V. All rights reserved.