Raman spectra and structure of (1 − x)RbNO3 + xAl2O3 systems

By Raman spectroscopy the structural dynamic properties of rubidium nitrate RbNO 3 and its heterogeneous composites with nanosized powder of alumina Al 2 O 3 are studied at different temperatures, phase states, and concentrations of Al 2 O 3 nanopowder. At high concentrations ( x ≥ 0.5) of the Al 2...

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Bibliographic Details
Published in:Journal of structural chemistry 2015-06, Vol.56 (3), p.428-435
Main Authors: Gafurov, M. M., Rabadanov, K. Sh, Ataev, M. B., Aliev, A. R., Amirov, A. M., Kubataev, Z. Yu
Format: Article
Language:English
Subjects:
Atomic
Atomic/Molecular Structure and Spectra
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Molecular
Optical and Plasma Physics
Physical Chemistry
Solid State Physics
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Summary:By Raman spectroscopy the structural dynamic properties of rubidium nitrate RbNO 3 and its heterogeneous composites with nanosized powder of alumina Al 2 O 3 are studied at different temperatures, phase states, and concentrations of Al 2 O 3 nanopowder. At high concentrations ( x ≥ 0.5) of the Al 2 O 3 filler an additional component with a maximum at ν 1 c ∼ 1049 cm −1 is detected in the Raman spectrum of the heterogeneous system. It can be assigned to NO 3 − vibrations located in the near-surface region of Al 2 O 3 nanoparticles. Furthermore, at high concentrations ( x ≥ 0.5) of the Al 2 O 3 filler spectral manifestations of phase transitions of crystalline rubidium nitrate RbNO 3 disappear. This indicates a radical change in the microstructure of the heterogeneous system in comparison with the homogeneous one.
ISSN:0022-4766
1573-8779
DOI:10.1134/S002247661503004X