Dynamic processes of the water sublattice in FeTiF6·xH2O·yD2O crystal

Dynamic processes of the water sublattice in FeTiF6·xH2O·yD2O crystal

Phase transition in FeTiF6·xH2O·yD2O crystals has been studied by Raman spectroscopy. The 611 cm−1 line corresponding to mode A1g of [TiF6]2− system does not exhibit anomalous behavior associated with the phase transition. The temperature studies showed that below the phase transition temperature, t...

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Veröffentlicht in:Journal of Raman spectroscopy 2022-10, Vol.53 (10), p.1704-1709
Hauptverfasser: Gerasimova YuV, Krylov, A S, AN, Vtyurin, Laptash, N M, Pogoreltsev, E I, Dubrovskiy, A A, Gerasimov MA
Format: Artikel
Sprache:eng
Schlagworte:
Crystals
deuterium ordering
dynamics
hydrated iron fluoridotitanate
hydrogen bonds
phase transition
Phase transitions
Raman spectroscopy
spectra
Transition temperature
Transition temperatures
water sublattice
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Zusammenfassung:Phase transition in FeTiF6·xH2O·yD2O crystals has been studied by Raman spectroscopy. The 611 cm−1 line corresponding to mode A1g of [TiF6]2− system does not exhibit anomalous behavior associated with the phase transition. The temperature studies showed that below the phase transition temperature, the equivalence of D2O molecules in FeTiF6·xH2O·yD2O octahedron is broken. The phase transition mechanism in the compound under study is associated with Fe(xH2O·yD2O) complex. The role of iron‐water octahedron in the FeTiF6·xH2O·yD2O system has been studied by Raman spectroscopy. A1g[TiF6]2− groups remain stable over the entire temperature range. The main role in phase transition mechanism is due to the transformation of the water complex Fe(xH2O·yD2O).
ISSN:0377-0486
1097-4555
DOI:10.1002/jrs.6430