Determination of optical properties of hexagonal lithium iodate crystal by use of NQR and IR spectroscopy

Abstract The NQR Zeeman effect of 127 I (± 1 2 ←→ ± 3 2 transition) for the LiIO 3 crystal of hexagonal modification has been investigated, and the EFTG asymmetry parameter for nuclei of 127 I determined. Measurements of optical properties of the z -cut crystal in polarized light within the region of stretching vibrations and their overtones for IO − 3 revealed that transmission (reflection) depends on the direction of the incident light wave electric vector. The results obtained indicate that crystals of LiIO 3 grown from aqueous solutions show anomalous biaxiality.