Spectroscopic evidence of octahedral iron (III) in soda-lime silicate glasses

Roman blue-green bottle glass: chemical–optical analysis and high temperature viscosity modelling

“…The Fe 3þ and Mn 2þ ions both have the same 3d 5 electronic configuration, for which all ded transitions are forbidden, decreasing their intensity considerably. The 3d 5 configuration produces a complex range of weak, narrow absorption bands in the same narrow range of 330e625 nm (Bates, 1962;Hannoyer et al, 1992;Nelson and White, 1980). Bands have been observed at 380 nm, 415 nm, 435 nm, 445 nm and 490 nm due to Fe 3þ and at 352 nm and 422 nm due to Mn 2þ .…”

Structural, electrical and magnetic properties of polystyrene films filled with AgNO3–FeCl3 mixed fillers

“…At the lower part of the magnetic field E1700 G a deformed signal characterized by g % 4:3400 can be noticed. This deformed signal can be attributed to the presence of an octahedral distribution of Fe 3+ ions in the PS matrix [43][44][45]. The evolution of the ESR spectra with X X5% depicts an increase in the intensity of the deformed signal with respect to the broad signal.…”

The structural behavior of ferric and ferrous iron in aluminosilicate glass near meta-aluminosilicate joins

“…It has also been suggested that the Z/r 2 (ionization potential) of metal cations may affect the local iron-oxygen polyhedral geometry. This effect has been related to steric factors associated with chargebalance of tetrahedrally coordinated Fe 3+ (Mysen et al, 1984(Mysen et al, , 1985aSpiering and Seifert, 1985;Hannoyer et al, 1992;Nagata and Hayashi, 2001).…”