Glancing-angle x-ray absorption spectroscopy of corroded borosilicate glass surfaces containing uranium

Journal Article · Wed Jun 07 00:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00194a024· OSTI ID:6971100

Greaves, G N; Steel, A ^[1]; Barrett, N T; Thornley, F R ^[2]; Antonini, G M ^[3]; Willis, B T.M. ^[4]

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1. SERC Daresbury Lab., Warrington (England)
2. Univ. of Strathclyde, Glasgow (England)
3. Universita di Modena (Italy)
4. Chemical Crystallography Lab., Oxford (England)

The local atomic structure surrounding uranium in borosilicate glass has been investigated by fluorescence x-ray absorption spectroscopy. By employing angles of incidence either side of the critical angle for total external reflection, surface and near-surface structure can be distinguished. The results of leaching in water at 100{degree}C have been examined in detail. Wet and dried glass surfaces can be differentiated. Analysis of glancing-angle spectra demonstrates that uranium occupies a uranyl-like environment that hydrates as leaching progresses. Uranyl complexing occurs in a planar geometry. The initial corrosion process can be readily understood by using the modified random network model for glass structure, which predicts diffusion of cations and water taking place via percolation pathways through the network. Following extended corrosion treatment, evidence for the formation of hydrated uranyl silicates that the surface has been found.

• OSTI ID: 6971100
• Journal Information: Journal of the American Chemical Society; (USA), Vol. 111:12; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BOROSILICATE GLASS
ABSORPTION SPECTROSCOPY
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
RADIOACTIVE WASTE STORAGE
URANIUM
X-RAY SPECTROSCOPY
ACTINIDES
DATA
ELEMENTS
GLASS
INFORMATION
MANAGEMENT
METALS
NUMERICAL DATA
SPECTROSCOPY
STORAGE
WASTE MANAGEMENT
WASTE STORAGE
400600* - Radiation Chemistry
052000 - Nuclear Fuels- Waste Management