High-Pressure Raman Spectra and Structure Phase Transition for Molecule Crystals

Pressure dependence on the intensities and frequency of Raman bonds, crystal field splitting and mode-Grneisen parameter were discussed. Raman data were taken from our experiments on NH3F, HCCl3, HCBr3, S8 and C3N6H6 et al. Raman spectroscopic evidence for pressure induced structure phase transition of molecule crystal and the methods to determine new phase under high pressure were summed up.