Abstract
The EPR spectrum of Cu2+ ions in (ND4)2Zn(SO4)2.6D2O has been measured at 77K for a large number of orientations of the applied magnetic field. The results of a detailed analysis yield values for the spin-Hamiltonian parameters. The hyperfine values are in substantial disagreement with those previously reported by Bleaney, Bowers and Ingram (1955), although the g-values are consistent with other previously reported work. The Zeeman and hyperfine tensors are coincident to within 1 degrees and lie along the nearest-neighbour water ligand bonds to within experimental accuracy. The symmetry of the Cu2+ site is therefore orthorhombic, despite the fact that the overall crystal symmetry is monoclinic.
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