Fig. : Raman spectra of Fe3O4 (Magnetite, laser 633 nm) and Fe2O3 (Hematite, laser 514 nm). Fe3O4 (data courtesy , , Fe2O3 (data courtesy El , frequency range is from 153 to 900 cm -1 (see Fig. ). For the deconvolution, five q-Gaussians have been used. For the stronger peaks the values of the q-parameters are given in the figure . A quite flat q-Gaussian seems being related to a band at 475 cm -1 . In the following discussion of the magnetite Raman spectrum, we will see that a band at 470-472 cm -1 has been detected . In the lower part of the plot, the misfit is also proposed. On the right, the same fit is shown with the log scale for yaxis (semi log scale). Data and q-Gaussians are given as functions of integers n (equally spaced points used in fitting), for the x-axis which is representing the Raman shift. A convenient scale is used for the y-axis (intensity axis). The fitting calculation is obtained by minimizing the sum of the squares of the deviations.