“…The studies of acoustic anisotropy in the AgGaGe 3 Se 8 crystals [8] have given some reasons to believe that AgGaGe 3 Se 8 can turn out to be one of the best acoustooptic materials for the infrared spectral range. At the same time, the other optical properties of AgGaGe 3 Se 8 are studied in a much less detail.…”