Fig. : The best fit (blue) onto the curve (red) given by Hasdeo et al. A q-BWF is used (the values of α, ξ and q-parameters are given in the figure). The misfit is proposed in the lower part of the plot. On the right, the same fit is shown with the log scale for y-axis (semi log scale). Data and q-BWF are given as functions of integers n (equally spaced points), 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 (sum from n=1 to n=660). The value of this sum is 5.5 x 10 -5 . Some misfit exists but it is due to the recovering of data from the figure in Hasdeo et al.