THE CHARACTERISTICS OF ABRUPT CHANGE ON ELASTIC CONSTANTS C₃₃ of LiKSO₄ CRYSTAL AT 60°C

Using the ultrasonic pulse echo overlap technique, we have measured the temperature dependence of the elastic constant C₃₃ of LiKSO₄ crystal. The abrupt change of C₃₃ occurs at 60°C, and there is a large temperature hysteresis. On repeated experiments, this abrupt peak of C₃₃ reduces successively. But after a certain time of "seasoning", it appears again.