The theory of the nuclear hyperfine structure of paramagnetic resonance spectra in the copper Tutton salts

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Abstract
The general theory of a previous paper is applied to the copper Tutton salts. It is found that unless account is taken of the effect of admixed configurations containing unpaired s-electrons, agreement with experiment is impossible. Allowance for unpaired s-electron configurations gives good agreement, both for anisotropy and magnitude of the effect. The effect of the nuclear quadrupole moment, though small, is important, and the paramagnetic resonance method is in principle perhaps capable of giving a more accurate value of this nuclear constant than optical methods.