Fig. : A split-q-Gaussians has been used for G peak, center 1605 cm-1. For D, we used a q-Gaussian, q=1.80, center 1347 cm-1. Two further q-Gaussians have been used on the left and on the right. The sample GO3 data are a courtesy by As shown by the previous figures, the use of q-Gaussians instead of Lorentzian and Gaussian functions slightly changes positions and areas of the peaks. What is deserving further consideration is the use of asymmetric split-q-Gaussian functions. We can see from Fig. and 16, that we do not need the D3 component.