Abstract
Fe K-edge x-ray absorption fine-structure (XAFS) measurements were performed on glass samples of (Fe3O4)0.3(P2O5)0.7 with various amounts of Na2O or UO2. Near-edge and extended-XAFS regions are studied and comparisons are made to several reference compounds. We find that iron in the base glass is ~25% divalent and that the Fe2+ coordination is predominantly octahedral, while Fe3+ sites are roughly split between tetrahedral and octahedral coordinations. Also, we measure roughly one FeñOñP link per iron. Substitution of Na2O or UO2 up to 15 mo1% primarily affects the first FeñO shell. The results are compared to data from the related material Fe3(P2O7)2.
Recommended Citation
C. H. Booth et al., "Oxygen and Phosphorus Coordination Around Iron in Crystalline Ferric Ferrous Pyrophosphate and Iron-phosphate Glasses with UO₂ or Na₂O," Journal of Materials Research, Materials Research Society, Jun 1999.
The definitive version is available at https://doi.org/10.1557/JMR.1999.0352
Department(s)
Materials Science and Engineering
Sponsor(s)
United States. Department of Energy
International Standard Serial Number (ISSN)
0884-2914
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 1999 Materials Research Society, All rights reserved.
Publication Date
01 Jun 1999
