Title

Iron Valence and Coordination in Phosphate Glasses as Studied by Optical Spectroscopy

Abstract

Optical spectroscopy was employed to study iron phosphate glasses of the general composition xFe2O3(100−x)P2O5 (14≤x≤47 mol%). Cation vibrational properties showed that iron is predominantly present as iron(II) in glasses of lower total iron content and as iron(III) in glasses of higher total iron content. In glasses containing 40 and 47 mol% Fe2O3 some of iron(III) ions changed from octahedral to tetrahedral coordination. Increasing iron content increased network disorder to the point where the structural changes occur, i.e., where iron cations changed their charge or coordination.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Composition Effects; Coordination Reactions; Molecular Vibrations; Phosphate Glass; Spectroscopic Analysis

Library of Congress Subject Headings

Glass
Iron oxides
Molecular structure
Optical spectroscopy
Phosphorus compounds

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1998 Elsevier, All rights reserved.

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