Optical and structural homogeneity of undoped Ca4GdO(BO3)(3) Crystals grown
from the melt by the Czochralski method in the [010] direction was investi
gated by spectroscopic measurements and using an automated spectropolarimet
er over the entire area of the samples in the wavelength range between 660
and 800 nm. A fair to good optical quality of the investigated crystals was
found. Those results are compared with chemical etching experiments.