The ionic of univalent ionic crystals is dealt with as non-harmonic oscillator, revised value of perturbation term on energy level is obtained by using perturbation theory.

• 将单价离子晶体的离子进行非谐振子处理,利用微扰理论求解微扰项对能级的修正值,与经典结果比较,这种量子方法计算出的单价离子晶体结合能更为精确。