Many metal ions impair ultraviolet transparency when present in glass owing to charge transfer absorption bands. Existing relevant spectroscopic data, although limited, do indicate that the principle of optical electronegativity can be applied and that the onset of ultraviolet impairment is linked to the state of polarisation of the oxygen atoms. Linking optical electronegativity with optical basicity allows a rough estimation of frequency shift for changes in glass composition.
Origin
University Of Aberdeen, Scotland
Journal Title
Phys Chem Glasses 38 6 1997 289-292
Sector
Special Glass
Class
S 1305