Abstract
The theory of covalency is applied to the discussion ofg-factors and hyperfine constantsA of a V4+ ion in tetrahedral sites in garnets Ca3X2Ge3O12 with X=Sc, Al, Lu, In, and NaCa2. Mg2V3O12, Ca3Sc2Si3O12, Sr3Sc2Ge3O12. The site symmetry is S4. Coefficients in LCAO-MO wave function and the Fermi contact interaction constantx are determined by an iterative procedure from experimental data. The spin-orbit coupling coefficient ζ d and radial average 〈r −3〉 are deduced from the condition of solvability of four equations: overlap and charge-transfer integrals are also determined.
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