EPR investigations of Gd/sup 3 +/ in single crystals and powders of the zircon--structure orthophosphates YPO/sub 4/, ScPO/sub 4/, and LuPO/sub 4/
The tetragonal xenotime (YPO/sub 4/) and monoclinic monazite (CePO/sub 4/) orthophosphates are known to be chemically and physically stable in geological environments and are also radiation resistant. For these reasons, materials of this type are currently candidates for the primary containment of radioactive actinide solid wastes. Single crystals of the tetragonal orthophosphates YPO/sub 4/, ScPO/sub 4/, and LuPO/sub 4/ doped with Gd/sup 3 +/ were grown by slowly cooling a Pb/sub 2/P/sub 2/O/sub 7/ flux. Finely divided (<0.1 ..mu..), rare-earth-doped powders of these materials were also prepared using a technique of precipitation in molten urea. Electron paramagnetic resonance investigations have shown that the Gd/sup 3 +/ impurities occupy identical substitutional sites in both single crystal and powder specimens of the tetragonal-symmetry orthophosphates. These results provide a basis for future investigations of the effects of heavy-particle radiation damage in the lanthanide orthophosphates.
- Research Organization:
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
- OSTI ID:
- 5201174
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 73:3; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
EPR and thermoluminescence investigations of Mn/sup 2 +/ in LuPO/sub 4/, YPO/sub 4/, and ScPO/sub 4/
EPR study of rare-earth impurities in single crystals of the zircon-structure orthophosphates ScPO/sub 4/, YPO/sub 4/, and LuPO/sub 4/
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDE COMPOUNDS
ATOMIC IONS
CHARGED PARTICLES
CRYSTALS
ELECTRON SPIN RESONANCE
FEASIBILITY STUDIES
GADOLINIUM IONS
IONS
LUTETIUM COMPOUNDS
LUTETIUM PHOSPHATES
MAGNETIC RESONANCE
MANAGEMENT
MINERALS
MONAZITES
MONOCRYSTALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
RARE EARTH COMPOUNDS
RESONANCE
SCANDIUM COMPOUNDS
SCANDIUM PHOSPHATES
THORIUM COMPOUNDS
THORIUM MINERALS
THORIUM PHOSPHATES
TRANSITION ELEMENT COMPOUNDS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
XENOTIME
YTTRIUM COMPOUNDS
YTTRIUM PHOSPHATES