The EPR parameters, anisotropic 𝑔-factors $g_{x}$, $g_{y}$ and $g_{z}$ for Cu2+ ion and hyperfine structure constants $A_{x}$, $A_{y}$ and $A_{z}$ for Cu2+ in LiNbO3 crystal are calculated by the method of diagonalizing the full Hamiltonian matrix. The crystal-field parameters contact with the crystal structure by the aid of the superposition model. The optical transition parameters are calculated using Zhao crystal-field model. The calculated results are in good agreement with the observed values. The results are discussed.
