Investigation of the thermal transformations in the double phosphates of rare-earth elements and alkali metals M/sup I/Ln(PO/sub 3/)/sub 4/ by raman spectroscopy
Journal Article
·
· Inorg. Mater. (Engl. Transl.); (United States)
OSTI ID:5775765
The authors investigate the thermal transformations in the double phosphate M/sup I/Ln(PO/sub 3/)/sub 4/ (M/sup I/ = Li, Na, K, Rb, Cs; Ln - La, Eu, Yb) (which is used as laser materials and luminophores) over a wide range of temperatures between room temperature and the temperature of the superheated melt by Raman spectroscopy. This method allowed the investigation of the whole range of thermal transformations, as well as the identification of the crystalline forms in the solid-phase transitions and peritectic dissociation, and the following of the homogenization process in the molten double phosphates. The Raman spectra of the various structure types of the double phosphates M/sup I/Ln(PO/sub 3/)/sub 4/ are given as are the frequencies of the lines in the Raman spectra and their assignments to the groups of internal and external vibrations of the phosphorus-oxygen anions and also the vibration of the (M/sup I/, Ln)-O bond. The nature of the fusion of M/sup I/Ln(PO/sub 3/)/sub 4/ is also investigated.
- OSTI ID:
- 5775765
- Journal Information:
- Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 23:2; ISSN INOMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CESIUM COMPOUNDS
CESIUM PHOSPHATES
EUROPIUM COMPOUNDS
EUROPIUM PHOSPHATES
LANTHANUM COMPOUNDS
LANTHANUM PHOSPHATES
LASER MATERIALS
LATTICE PARAMETERS
LATTICE VIBRATIONS
LINE WIDTHS
LITHIUM COMPOUNDS
LITHIUM PHOSPHATES
MATERIALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORS
PHOSPHORUS COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM PHOSPHATES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
RUBIDIUM COMPOUNDS
RUBIDIUM PHOSPHATES
SODIUM COMPOUNDS
SODIUM PHOSPHATES
SPECTRA
TEMPERATURE EFFECTS
YTTERBIUM COMPOUNDS
YTTERBIUM PHOSPHATES
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CESIUM COMPOUNDS
CESIUM PHOSPHATES
EUROPIUM COMPOUNDS
EUROPIUM PHOSPHATES
LANTHANUM COMPOUNDS
LANTHANUM PHOSPHATES
LASER MATERIALS
LATTICE PARAMETERS
LATTICE VIBRATIONS
LINE WIDTHS
LITHIUM COMPOUNDS
LITHIUM PHOSPHATES
MATERIALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORS
PHOSPHORUS COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM PHOSPHATES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
RUBIDIUM COMPOUNDS
RUBIDIUM PHOSPHATES
SODIUM COMPOUNDS
SODIUM PHOSPHATES
SPECTRA
TEMPERATURE EFFECTS
YTTERBIUM COMPOUNDS
YTTERBIUM PHOSPHATES