Raman spectra of the second order in crystals Part V. Aragonite

Abstract

The Raman spectrum of aragonite crystal has been photographed using λ 2536.5 excitation. 25 Frequency shifts have been recorded as compared to 17 observed previously. They are distributed as follows: five due to the internal oscillation of the CO₃ ion, fourteen due to lattice oscillation and six belonging to the second order spectrum. The latter have been assigned as some of the octaves and combinations of the fundamental frequencies of vibration of the aragonite structure.