Published January 1990
| Version v1
Journal article
XAS study of lanthanide ion speciation in borosilicate glass
- 1. Lawrence Livermore National Lab., Chemistry and Materials Science Div., CA (USA)
- 2. Boeing Company, Seattle, WA (USA)
- 3. Isotope and Nuclear Chemistry Div., Los Alamos National Lab., NM (USA)
- 4. Dept. of Chemistry, Northern Arizona Univ., Flagstaff (USA)
Description
The site environment of selected lanthanide ions (Ce, Pr, Gd and Lu) representative of 4f element fission products has been investigated in a typical borosilicate nuclear waste glass. X-ray absorption spectroscopy (XAS) in combination with other techniques showed that under air-firing conditions the lanthanide ions, except for Ce, enter the glass predominantly in the trivalent state and have well-defined first coordination shells. Approximate coordination numbers of 8±2 (Pr) and 6±2 (Gd, Lu) and metal-oxygen distances of 2.49±0.05 A (Pr), 2.29±0.05 A (Gd) and 2.20±0.05 A (Lu) were deduced. (orig.)
Additional details
Publishing Information
- Journal Title
- Journal of Non-Crystalline Solids
- Journal Volume
- 116
- Journal Issue
- 1
- Series
- J. Non-Cryst. Solids.
- Journal Page Range
- 57-62
- ISSN
- 0022-3093
- CODEN
- JNCSB
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 21058012
- Subject category
- S36: MATERIALS SCIENCE; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Descriptors DEI
- BOROSILICATE GLASS; CERIUM ADDITIONS; CHEMICAL COMPOSITION; COORDINATION NUMBER; DOPED MATERIALS; FISSION PRODUCTS; GADOLINIUM ADDITIONS; INTERATOMIC DISTANCES; LEAST SQUARE FIT; LUTETIUM ADDITIONS; PRASEODYMIUM ADDITIONS; RADIOACTIVE WASTE PROCESSING; X-RAY DIFFRACTION
- Descriptors DEC
- COHERENT SCATTERING; DIFFRACTION; DISTANCE; GLASS; ISOTOPES; MANAGEMENT; MATERIALS; MAXIMUM-LIKELIHOOD FIT; NUMERICAL SOLUTION; RADIOACTIVE MATERIALS; RARE EARTH ADDITIONS; SCATTERING; WASTE MANAGEMENT; WASTE PROCESSING