Abstract
AbstractConventional Raman and incident circular polarization Raman optical activity (ROA) spectra are presented for the lattice vibrations of enantiomorphic pairs of optically active cubic crystals NaBrO3 and NaCIO3 in depolarized right‐angle scattering (65‐145 cm−1) and unpolarized backscattering (55‐200 cm−1). Since enantiomorphic cubic crystals are also piezoelectric owing to the lack of a centre of inversion, the degeneracy of their triply degenerate polar (infrared and Raman active) F phonons is partially lifted because of long‐range dipole‐dipole interactions. Therefore, non‐degenerate longitudinal and doubly degenerate transverse optical phonons can be separately observed in the ROA spectra.
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