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Figure 2
Selected ranges of the Raman spectra between 293 and 83 K. (a) SiO2-framework vibrations (60–500 cm−1), (b) C—C stretching vibrations (770–1080 cm−1), (c) C—H stretching vibrations (2800–3100 cm−1).

IUCrJ
Volume 5| Part 5| September 2018| Pages 595-607
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518009107