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Vibrational spectra of 1:2 ordered perovskites
- Source :
- Journal of Solid State Chemistry. 10:39-45
- Publication Year :
- 1974
- Publisher :
- Elsevier BV, 1974.
-
Abstract
- The infrared and Raman spectra of some perovskites with general formula A 3 BB′ 2 O 9 are reported, viz. Sr 3 MgNb 2 O 9 , Sr 3 CaNb 2 O 9 , Pb 3 MgNb 2 O 9 , and Ba 3 Gd 2 WO 9 . The interpretation is by far not as simple as for 1:1 ordered perovskites. Only a rough assignment of the internal modes of the niobate and tungstate octahedra can be made. The spectra of the niobates are very sensitive to the degree of order between the divalent metal ions and the Nb 5+ ions among the smaller cation sublattice. This is evaluated qualitatively.
- Subjects :
- Chemistry
Infrared
Inorganic chemistry
Condensed Matter Physics
Spectral line
Electronic, Optical and Magnetic Materials
Ion
Inorganic Chemistry
symbols.namesake
chemistry.chemical_compound
Crystallography
Octahedron
Tungstate
Materials Chemistry
Ceramics and Composites
symbols
Degree of order
Physical and Theoretical Chemistry
Raman spectroscopy
Vibrational spectra
Subjects
Details
- ISSN :
- 00224596
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Journal of Solid State Chemistry
- Accession number :
- edsair.doi...........7aa60a00cb6c929eac3ea90269f31758