The region of 5 mum is one of the atmospheric windows where ozone may be easily observed in atmospheric spectra. It corresponds to the triad 2nu3, nu1 + nu3, 2nu1, where nu1 + nu3 is the strongest band. Isotopic bands of nu1 + nu3, O-16O-16O-18 and O-16O-18O-16 may also be observed. This study reports fine positions, intensities, self broadening coefficients, air broadening coefficients and Shifts Of 03. These spectroscopic parameters are of interest for atmospheric measurements. Some of the results have been recently published, other are new and correspond to work in progress.