Identification of chromium and nickel sites in zinc phosphate glasses

Optical and EPR investigations of chromium and nickel doped zinc phosphate glasses are carried out at room temperature to evaluate crystal field, spin-Hamiltonian and bonding parameters. For Cr3C ion, the site symmetry is ascribed to a distorted octahedron, whereas the Ni2C ion is located in a near octahedral site. In addition, the bonding parameters suggest covalent nature for Cr3C and a moderate covalent nature for Ni2C in the zinc phosphate glasses. q 2005 Elsevier B.V. All rights reserved