Luminescence of. cap alpha. - and. beta. -LaNb/sub 3/O/sub 9/

Journal Article · Fri Nov 01 04:00:00 EST 1985 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(85)90159-8· OSTI ID:6466065

Verhaar, H C.G.; Donker, H; Dirksen, G J; Lammers, M J.J.; Blasse, G

The luminescence of undoped and rare-earth doped LaNb/sub 3/O/sub 9/ is reported. The two modifications (..cap alpha.. and ..beta..) show striking differences. Whereas undoped ..beta..-LaNb/sub 3/O/sub 9/ does not luminesce at all (down to 4.2 K), ..cap alpha..-LaNb/sub 3/P/sub 9/ emits efficiently with a quenching temperature of 250 K. Energy transfer from niobate to rare-earth dopants is observed for the ..cap alpha.., but not for the ..beta.. modification. The rare-earth dopant emission consists of sharp lines for the ..cap alpha.. modification, but is considerably broadened for the ..beta.. modification. The luminescence properties are discussed in terms of the crystal structure. In addition results for ..cap alpha..-NbPO/sub 5/ will be given. 17 references, 8 figures, 1 table.

• Research Organization: State Univ., Utrecht, Netherlands
• OSTI ID: 6466065
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 60:1; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
COMPLEXES
CRYSTAL DOPING
DATA
DYSPROSIUM COMPOUNDS
EMISSION SPECTROSCOPY
EUROPIUM COMPOUNDS
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPLEXES
LASER SPECTROSCOPY
LUMINESCENCE
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NIOBIUM PHOSPHATES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RAMAN SPECTROSCOPY
RARE EARTH COMPLEXES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SAMARIUM COMPOUNDS
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TERBIUM COMPOUNDS
THULIUM COMPOUNDS
TRACE AMOUNTS
TRANSITION ELEMENT COMPOUNDS