Valence states of actinides in synthetic monazites. [For possible storage of high-level nuclear wastes]
Conference
·
OSTI ID:6841189
The valence states of various actinides doped into the lanthanide orthophosphates (LnPO/sub 4/) have been investigated. Actinide-doped LnPO/sub 4/ single crystals were grown by means of a flux technique and the actinide valence states were determined by optical absorption spectrophotometry. Radiation damage effects were also studied in these systems. The lanthanide orthophosphates are found in nature in the form of the mineral monazite and synthetic analogs of this substance represent a promising primary containment medium for the isolation of high-level nuclear wastes.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6841189
- Report Number(s):
- CONF-801124-22(Draft)
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Tue Oct 31 23:00:00 EST 1978
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Conference
·
Mon Sep 01 00:00:00 EDT 1980
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EPR spectroscopic characterization of Gd/sup 3 +/ in the monazite-type rare-earth orthophosphates: LaPO/sub 4/, CePO/sub 4/, PrPO/sub 4/, NdPO/sub 4/, SmPO/sub 4/, and EuPO/sub 4/
Journal Article
·
Sat Jan 31 23:00:00 EST 1981
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6685912
Related Subjects
052002 -- Nuclear Fuels-- Waste Disposal & Storage
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTINIDE COMPOUNDS
ACTINIDES
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DOPED MATERIALS
ELEMENTS
HIGH-LEVEL RADIOACTIVE WASTES
MANAGEMENT
MATERIALS
METALS
MINERALS
MONAZITES
MONOCRYSTALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POINT DEFECTS
RADIATION EFFECTS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RADIOACTIVE WASTE STORAGE
RADIOACTIVE WASTES
RARE EARTH COMPOUNDS
SPECTROPHOTOMETRY
STORAGE
THORIUM COMPOUNDS
THORIUM MINERALS
THORIUM PHOSPHATES
UNDERGROUND STORAGE
VACANCIES
VALENCE
WASTE MANAGEMENT
WASTE STORAGE
WASTES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTINIDE COMPOUNDS
ACTINIDES
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DOPED MATERIALS
ELEMENTS
HIGH-LEVEL RADIOACTIVE WASTES
MANAGEMENT
MATERIALS
METALS
MINERALS
MONAZITES
MONOCRYSTALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POINT DEFECTS
RADIATION EFFECTS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RADIOACTIVE WASTE STORAGE
RADIOACTIVE WASTES
RARE EARTH COMPOUNDS
SPECTROPHOTOMETRY
STORAGE
THORIUM COMPOUNDS
THORIUM MINERALS
THORIUM PHOSPHATES
UNDERGROUND STORAGE
VACANCIES
VALENCE
WASTE MANAGEMENT
WASTE STORAGE
WASTES