Raman Spectra of the Inclusions in KDP Crystals

The inclusions in KDP crystals were studied by using laser microscope Raman spectrum technique. Water solution was found in the spherical inclusions between pyramid sectors, while CO2 and H2S in the prolate inclusions in expanded prismatic sectors besides water solutions. These impurities were also found in the crystals with dense scatters. The results show that the compositions differences in above inclusions are related to different growth mechanisms on the prismatic and the pyramidal faces of the crystal. The existence of these impurities in growing solution is one of the factors to generate the inclusions as well as scatters in crystals.