Structural investigation of glasses belonging to the Na/sub 2/O-Nb/sub 2/O/sub 5/-P/sub 2/O/sub 5/ system
Journal Article
·
· J. Solid State Chem.; (United States)
The structure of glasses (with composition 0.855 (xNa/sub 2/O-yNb/sub 2/O/sub 5/-zP/sub 2/O/sub 5/)-0.145 Ln/sub 2/O/sub 3/; Ln = La, Nd, Eu, and x + y + z = 100) has been investigated by Raman scattering and optical spectroscopy using Nd/sup 3 +/ and Eu/sup 3 +/ as local structural probes. For the niobium-poor glasses (y < 12.5) octahedral NbO/sub 6/ groups are inserted within modified metaphosphate chains. In contrast the network former of the niobium-rich glasses ( y > 12.5) contains chains of NbO/sub 6/ octahedra sharing common corners. An intermediate situation seems to occur for y approx. 12.5 which preserves the Nasicon-type structure with all oxygen atoms common to NbO/sub 6/ and PO/sub 4/ groups.
- Research Organization:
- Universite de Bordeaux I, Talence (France)
- OSTI ID:
- 7257401
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 73:2; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ABSORPTION SPECTROSCOPY
ALKALI METAL COMPOUNDS
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
GLASS
INFORMATION
IONS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LASER SPECTROSCOPY
MICROSTRUCTURE
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
RAMAN SPECTROSCOPY
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SODIUM COMPOUNDS
SODIUM OXIDES
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
VISIBLE SPECTRA
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ABSORPTION SPECTROSCOPY
ALKALI METAL COMPOUNDS
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
GLASS
INFORMATION
IONS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LASER SPECTROSCOPY
MICROSTRUCTURE
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
RAMAN SPECTROSCOPY
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SODIUM COMPOUNDS
SODIUM OXIDES
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
VISIBLE SPECTRA