6533b860fe1ef96bd12c2f2b
RESEARCH PRODUCT
XAFS STUDIES OF OCTAHEDRAL AMORPHOUS OXIDES
E. BurattiniJuris PuransAlexei Kuzminsubject
CrystallographyValence (chemistry)Materials scienceOctahedronRutileGeneral EngineeringGeneral Physics and AstronomyPolaronSpectroscopyNanocrystalline materialAmorphous solidX-ray absorption fine structuredescription
The relationships between the structures of octahedral and tetrahedral amorphous oxides, studied by XAFS spectroscopy, are considered. It was found that a-WO3, a-MoO3, a-V2O5 thin films and glasses have strongly distorted, but well defined, oxygen octahedra, which are joined by vertices (a-WO3, a-MoO3) or by vertices and edges (a-V2O5), and form a random network. At the same time, a-IrO2 and a-NiO have less distorted oxygen octahedra, which form the rutile type and rock salt type nanocrystalline structures. The variation of the structure with the change of the metal valence is considered and the possibility of small radius polaron detection by XAFS is discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 |