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Raman mineralogy spectra at a distance

Raman mineralogy spectra at a distance
Raman mineralogy spectra at a distance A SuperCam Raman spectrum of the mineral gypsum taken with 20 laser shots at 2 meters distance is compared with a “textbook” in-situ example from the RRUFF spectral database. The SuperCam spectrum has nearly equivalent resolution (narrow emission lines) to the textbook example. The y-axis is relative “counts”. The relative heights of some of the peaks vary naturally between samples. Gypsum is a simple mineral to observe with Raman spectroscopy. More rigorous tests will follow once the instrument is thermally controlled, which significantly improves the signal to noise ratio.