Single crystal EPR and optical studies of paramagnetic ions doped zinc potassium phosphate hexahydrate - Part I: Cu(II) - a case of orthorhombic symmetry

Single crystal electron paramagnetic resonance (EPR) studies on Cu(II) dope d zinc potassium phosphate hexahydrate (ZPPH) were carried out at room temp erature. The angular variation spectra in the three orthogonal planes indic ate that the paramagnetic impurity has entered the lattice substitutionally in place of Zn (II) and the spin Hamiltonian parameters calculated from th ese spectra are g(xx) = 2.188, g(yy) = 2.032, g(zz) = 2.373, A(xx) = 50 G, A(yy) = 65.0 G and A(zz) = 80 G. The g and A tensors were coincident and th ese values matched fairly well with the values obtained from powder spectru m. The bonding parameters have also been calculated. (C) 2001 Elsevier Scie nce B.V. All rights reserved.