Electronic Bonding of Cu2+ in Amorphous and Crystalline TeO2: EPR and Optical Spectra
- 15 September 1972
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 57 (6) , 2364-2371
- https://doi.org/10.1063/1.1678595
Abstract
Electron paramagnetic resonance and optical spectra of Cu2+ ions doped into polymorphic TeO2 have been investigated. Spectra were obtained for the non‐Zachariasen, octahedrally coordinated amorphous form and for the tetragonal crystalline form. The spectra were interpreted in terms of a molecular‐orbital model of a Cu2+ ion in square‐planar coordination to the oxygen ligands and compared to results obtained previously for amorphous and tetragonal GeO2. The properties of the dopant Cu2+ ions in the non‐Zachariasen TeO2 glass were found to be similar to those of Cu2+ ions in the Zachariasen GeO2 glass. The Cu2+ ions were more covalently bonded in the TeO2 glass than in the TeO2 crystal and less covalently bonded in both forms of TeO2 than in the corresponding GeO2 polymorphs.Keywords
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