Defect chemistry analysis of the defect structure in Mg-doped LiNbO3 crystals

On the basis of the Li vacancy model of intrinsic defects in LiNbO3 crystal, the defect structure formed in LiNbO3:Mg varying with the Mg content are proposed. The Li2O and Nb2O5 contents, the Li/Nb ratio in the crystal, and the density of the crystal are calculated by using the defect structure. The calculated values are in good agreement with the reported experimental results.