Raman spectra of sulfates minerals 1:  Gypsum and anhydrite.

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Gypsum monocrystal with marked optic axes.

 

Anhydrite polycrystalline sample. (Alabaster France)

Low wavelength range spectra of gypsum (alpha spectrum) and anhydrite.

 

Complete spectrum of gypsum with the water stretching range above 3000 cm-1 included. Polarizer along alpha index.

 

Details of the water stretching vibrations of gypsum. Spectra recorded for the 3 axes alpha beta and gamma. The spectra can be compared with the harmonics recorded in the NIR.

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