High-energy X-ray diffraction study of La co-ordination in lanthanum phosphate glasses

Uwe Hoppe, Ezz Eldin Metwalli, Richard K. Brow, Jörg Neuefeind

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37 Scopus citations

Abstract

Differences in La co-ordination environments indicated in the structures of rare earth-phosphate crystals in glasses with compositions ranging from ultraphosphate to metaphosphate stoichiometries were investigated. A series of lanthanum phosphate glasses were characterized by X-ray diffraction analysis and a change of the La-O co-ordination number was extracted by Gaussian fitting of the first-neighbor distances. The decrease in co-ordination number was due to the transition of ultraphosphate glass structures to metaphosphate structures. The changes in the La environments explained the compositional dependence of glass properties.

Original languageEnglish
Pages (from-to)263-274
Number of pages12
JournalJournal of Non-Crystalline Solids
Volume297
Issue number2-3
DOIs
StatePublished - Feb 2002
Externally publishedYes

Funding

The participants from the University of Missouri-Rolla acknowledge the donors of The Petroleum Research Fund, administered by the American Chemical Society, for support of this research.

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