Raman spectroscopy is considered one of the best non-destructive techniques, as it provides a fingerprint of the mineral studied. In general, Raman can deal with small amounts of material with no previous preparation. The development of a new generation of solid-state lasers and spectrometers has increased the Raman spectroscopy accessibility. The International Mineralogical Association (IMA) has approved approximately 100 new minerals per year and, due to the rarity of the samples, Raman spectroscopy has frequently played an important role in their characterization. Another advantage is many characteristic spectra are provided for free in databases, as the RRUFF project from the University of Arizona, for mineral collectors and the scientific community. However, the band assignment is tricky and the spectra must be carefully compared with databases. During the workshop, we will present some theoretical aspects of vibrational analysis and methods for band assignments, such as factor group analysis and correlation method. The use of Raman databases will also be explored for the identification of minerals. Finally, we will investigate the role of Raman spectroscopy in the most recent characterization of new mineral species.
Marcelo Andrade (Brazil)
Sherif Kharbish (Egypt)