Abstract
In the study to delermine the effects of atmospheric moisture on CLBO crystal. we found the formation of Cs_2 B_<10>O_<16>8H_20 on the surface of CLBO crystal exposed to atmospheric moisture. This hydrate on the surface of CLBO crystal caused refractive index change and cracking CLBO crystdls were free from these problems by keeping CLBO crystals in dry atmosphere and/or annealing over 130℃.
