For the q-parameter between 1 and 2, the shape of the q-Gaussian function is intermediate between the Gaussian and the Lorentzian profile. Its behavior turns the q-Gaussian into a function suitable for the analysis of Raman spectra, because the spectral bands also are characterized by intermediate profiles between Lorentzian and Gaussian outlines . Besides these two functions, which remain the most popular for fitting Raman spectra, linear combinations (pseudo-Voigt distributions) or convolutions of them (Voigt distributions) are used too . The Voigtian convolution function turns out into a bell shape with a Gaussian kernel and wings which are asymptotically of the Lorentz form (as determined by , the asymptotic solution of Voigtian expansion has the leading term equal to 𝑎 0 𝜋 ⁄ 𝑥 2 ). In some literature, the wings are also mentioned as "tails".