We have previously told that, with the q-BWF functions, we have the possibility of decomposing the spectrum in a few components. The q-BWF function work well because of their asymmetric shape, coupled with the broadening role played by the q parameter in the q-exponential. However, we could ask ourselves if the use of symmetric components is suitable or not for decomposing BaTiO3 spectra. That is, for the specific band in the Figure , can we use symmetric functions for decomposing it? Let us try with the q-Gaussian functions, that is the q-BWF functions with xi=0. In the Figure , the comparison is given. On the right of Fig. we can see that two q-Gaussians cannot properly describe the asymmetry of the band. Even adding two further q-Gaussian components we do not improve the fit, that is, the misfit remains significant.