摘要

In this paper, the third-order perturbation formulas of EPR g factors g(i) (i=x, y, z) for d(9) ions in rhombic symmetry where the ground state being an vertical bar d(x2-y2)> admixture of and vertical bar d(z2)> states are derived. These formulas are based on a two-spin-orbit-parameter model in which the contributions to g factors due to both the spin-orbit parameter of the central 3d(n) ion and that of ligand ion are included. From these formulas, the g factors g(i) for the rhombic CuCl64- clusters in (3-chloroanilinium)(8)[CdCl6]CL4:Cu2+ crystal are calculated. The calculated values are in good agreement with those obtained by the complete diagonalization (of energy matrix) method and experimental values. Results are discussed.