Mechanism of LaFeO3 Perovskite‐Type Oxide Formation from the Thermal Decomposition of d‐f Heteronuclear Complex La[Fe(CN)6]‐5H2O

Nanosized, single‐phase perovskite‐type LaFeO 3 powders are synthesized by the thermal decomposition at 600°C of d‐f heteronuclear complex La[Fe(CN) 6 ]‐5H 2 O. The mechanism of the formation of LaFeO 3 has been studied by simultaneous thermogravimetric and differential thermal analysis (TG/DTA), Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), and scanning electron microscopy (SEM). The formation of LaFeO 3 from the complex involves the formation of a carbonated, orthorhombic transition phase, which facilitates the formation of the LaFeO 3 orthorhombic structure at low temperatures with a peculiar morphology.