Figure 5.

The relative intensities of Raman spectra and their second derivatives in the selected ranges: 1500–1200 cm⁻¹ ((A,B), respectively), 1200–800 cm⁻¹ ((C,D), respectively), and 550–400 cm⁻¹ ((E,F), respectively). Numbers in black indicate the same Raman shift values for all samples.