Crystal structure and spectral luminescence properties of the cation-deficient garnet Ca/sub 3/(Nb, Ga)/sub 2/Ga/sub 3/O/sub 12/-Nd/sup 3 +/
The first combined study of a cation-deficient garnet Ca/sub 3/(Nb, Ga)/sub 2/Ga/sub 3/O/sub 12/ containing Nd/sup 3 +/ and Cr/sup 3 +/ was performed. X-ray diffraction, absorption luminescence, SE spectra, and Raman light scattering established that the crystal has a disordered structure. Interatomic distances and structural angles were determined, and the property for disordering was reevaluated. The nature of the latter is associated with the statistical incorporation of muiltivalent cations at different crystallographic sites in the garnet. The stabilizing role of defects in this structure was noted. The basic spectral luminescence characteristics of activator ions were measured, including their intensity and concentration characteristics. All lines of Nd/sup 3 +/ stimulated emission were identified, being observed at low and room temperatures.
- OSTI ID:
- 5776048
- Journal Information:
- Inorg. Mater. (Engl. Transl.); (United States), Vol. 22:7; Other Information: Translated from Izv. Akad. Nauk SSSR, Neorg. Mater.; 22: No. 7, 1061-1071(Jul 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
CALCIUM OXIDES
CRYSTAL LATTICES
LUMINESCENCE
GALLIUM OXIDES
NEODYMIUM COMPOUNDS
NIOBIUM OXIDES
ABSORPTION SPECTRA
CHROMIUM COMPOUNDS
ELECTRIC DIPOLE MOMENTS
ELECTRON SPIN RESONANCE
EMISSION SPECTRA
EXCITED STATES
GROUND STATES
HYPERFINE STRUCTURE
J-J COUPLING
MULTIPLETS
ORDER PARAMETERS
RAMAN SPECTRA
STIMULATED EMISSION
VACANCIES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COUPLING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIPOLE MOMENTS
ELECTRIC MOMENTS
EMISSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
GALLIUM COMPOUNDS
INTERMEDIATE COUPLING
MAGNETIC RESONANCE
NIOBIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RESONANCE
SPECTRA
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360204 - Ceramics
Cermets
& Refractories- Physical Properties
640302 - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory