On the basis of the crystal-field theory the zero-field splitting and g-values of the ,A, ground state for d* impurity ions in a trigonally distorted octahedral field are calculated. Using perturbation theory the analytical expressions connecting the spin-Hamiltonian parameters with the crystalfield parameters are obtained. It is shown that experimental data for Cu3+ in A1,0, and Ni2+ in Also,, a-LiIO,, LiNbO, can be explained taking into account the influence of all the excited levels on the ground state. Ha OCHOBe TeOpHH KpLICTaJIJIHYeCKOrO IlOJIR IIpOBeneH paCq&T PaCIUeIIJIeHHH B HyJIeBOM nOJIe COCTORHHII ,A, HJIR IIpHMeCHbIX ds HOHOB B OKTa3ZPH-IIeCKOM IlOJIe C TpHrOHaJlLHbIM HCKalfCeHHeM. MeTonoM TeOpHM BO3M~~eHH~ IIOJIyZIeHbI aHaJILITHYeCKHe BbIPaHEeHHR, CBII3bIBaIoIUHe IlapaMeTpbI CllHH-TaMHJIbTOHHaHa C IIapa-MeTpaMH IEPHCTaJIIJILIYeCKOTO IIOJIR. nOKa3aH0, ZIT0 3KCIIepEiMeHTaJIbHble AaHHbIe nJIFJ 6Y%J&HHbIX ypOBHefii, B3aHMOAe%CTBYIoIUHX C OCHOBHbIM COCTORHHeM. g-@aKTOPOB OCHOBHOFO cu3+ B A1,0, H Ni2+ B A]@,, a-LiIo, H LiNbO, MoHHO 06'6RcHk1~L npn yYeTe BceX B03-

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