The annealing conditions and low angle boundaries of LiTaO_3 single crystals havre been studied. It is pointed out that the low angle boundaries are important factors influencing crystal quality and leading to crystal cracking.

• 研究了 LiTaO_3单晶的退火条件和小角度晶界,指出后者是影响晶体质量、导致晶体开裂的重要因素。