ResearchGate -At the following link, Interpretation_of_the_2D_peak_in_a_Raman_spectra_of_graphite, 2015, Danny Ahumada, University of California, Santa Barbara, proposed two Raman spectra of graphite. One spectrum corresponds to a sample that he synthesized, the other is of commercial graphite. Here, let us consider the sample prepared by Ahumada: we can see a peak given at 1579 cm -1 , with a shoulder that we estimate at 1620 cm -1 . Then, we have the peak at 1350 cm -1 . Therefore, we consider just three bands.