X-ray spectroscopic investigation of metamictization and annealing in crystalline phosphates, silicates and complex Ti-Nb-Ta oxides. Final report
Technical Report
·
OSTI ID:6442467
Metamict minerals have been damaged by the radioactive decay of their U and Th components and have been exposed to geologic processes over periods of many hundreds of millions of years. These metamict minerals can be considered to be the products of a natural long-term radiation damage experiment, hence there will be increased interest in the long term stability of these minerals because of their crystal-chemical similarities with phases in proposed waste-forms. A study was initiated of the effects of metamictization and annealing on crystalline phosphates, silicates and complex A/sub x/B/sub y/O/sub z/-type Ti-Nb-Ta oxides. This study included a detailed examination of the near neighbor site geometries of metal atoms in metamict minerals (e.g., A (Ca) and B (Ti) site cations) as determined by extended x-ray absorption fine structure (EXAFS) and x-ray absorption near edge structure (XANES) spectroscopy.
- Research Organization:
- Boeing Aerospace Co., Seattle, WA (USA)
- DOE Contract Number:
- AC06-83ER45010
- OSTI ID:
- 6442467
- Report Number(s):
- DOE/ER/45010-T1; ON: DE85000428
- Country of Publication:
- United States
- Language:
- English
Similar Records
X-ray spectroscopic investigation of metamictization and annealing in crystalline materials. Progress report, January 1984-January 1985
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·
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ALKALINE EARTH METAL COMPOUNDS
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CALCIUM OXIDES
CHALCOGENIDES
HEAT TREATMENTS
MANAGEMENT
MATERIALS
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MINERALS
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OXIDES
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TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WASTE DISPOSAL
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X-RAY SPECTRA