the lanio3 perovskite is a material that displays applications in several areas as catalysis, optics, in solid oxide fuel cells, etc. in this work the optimization of the synthesis of lanio3 perovskite was performed using the polymeric precursor method, modifying the metal/citric acid and ethyleneglycol/citric acid ratios. in general, the properties of these materials vary with the composition and the synthesis method. the materials were characterized by x-ray diffraction, thermal gravimetric analysis and fourier transform infrared spectroscopy. the perovskite with ratios metal/citric acid (1.0/1.0) and ethylene glycol/citric acid (60/40) showed better results to obtain the perovskite monophasic phase.