Raman spectra and phase transitions in Rb{sub 2}KInF{sub 6} elpasolite

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774511010159· OSTI ID:22054352

Krylov, A S; Vtyurin, A N ^[1]; Surovtsev, N V; Adishev, S V ^[2]; Voronov, V N; Oreshonkov, A S ^[1]

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1. Russian Academy of Sciences, Kirensky Institute of Physics, Siberian Branch (Russian Federation)
2. Russian Academy of Sciences, Institute of Automation and Electrometry, Siberian Branch (Russian Federation)

The Raman spectra of Rb{sub 2}KInF{sub 6} elpasolite crystal have been studied in a wide temperature range, including two phase transitions: from the cubic phase to the tetragonal phase and then to the monoclinic phase. Several anomalies of internal modes of InF{sub 6} octahedra and low-frequency lattice vibrations, which are related to the structural changes at the transition points, have been found and quantitatively analyzed. The results of a quantitative analysis of the temperature dependences of the parameters of spectral lines are in good agreement with the thermodynamic data on the phase transitions.

• OSTI ID: 22054352
• Journal Information: Crystallography Reports, Vol. 56, Issue 1; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
FLUORIDES
INDIUM COMPOUNDS
LATTICE VIBRATIONS
MONOCLINIC LATTICES
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
RAMAN SPECTRA
RUBIDIUM COMPOUNDS
TEMPERATURE DEPENDENCE