J. Appl. Cryst. (2002). 35, 228-232 [ doi:10.1107/S0021889802000778 ]
Abstract: The gyration tensor of LiIO3 has been measured in the temperature range between 293 and 493 K at a wavelength of 632.8 nm. Optical activity and birefringence for the (010) plane were determined by using a high-accuracy universal polarimeter (HAUP). Likewise, optical activity for the (001) plane was studied by using a conventional polarimeter in the same temperature range at 632.8 nm wavelength. In the latter case, a modulation of the optical activity was observed. This effect can be explained by multiple reflections within the slab with a high degree of plane parallelism.
Keywords: gyration tensor; high-accuracy universal polarimeter; optical activity; non-linear optical properties; birefringence; second-harmonic generation.
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