首页|Spectroscopy of structurally disordered hydrated iron fluoridotitanate in the regions of vibrational and electronic excitations
Spectroscopy of structurally disordered hydrated iron fluoridotitanate in the regions of vibrational and electronic excitations
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NSTL
Elsevier
Raman and optical absorption spectra of disordered hydrated iron fluoridotitanate (HITF) single crystal were studied. Temperature transformations of the Raman spectra indicate independent ordering processes of the [TiF6](2-) and [Fe(H2O)(6)](2+) complexes below the structural phase transition. The absorption spectrum in the near-infrared and visible ranges includes transitions from the high spin ground state T-5(2) of Fe2+ ion to the excited E-5 state and a set of excited triplets. Analysis by Tanabe-Sugano method gives crystal field Dq = 490 cm(-1) and Racah parameters B = 340 cm(-1) and C = 1904 cm(-1). Considerable decrease of B parameter as compared to the free ion value indicates a decrease of interelectron repulsion in the disordered neighborhood of Fe2+ ions. (C) 2021 Published by Elsevier B.V.
Hydrated iron fluoridotitanatePhase transitionOrder-disorderDynamicsRamanElectronic excitationsZINC FLUOROTITANATE HEXAHYDRATEPHASE-TRANSITIONSRAMAN-SPECTRAMANGANESEILMENITETITANIUM
Gerasimova, Yu. V.、Aleksandrovsky, A. S.、Gerasimov, M. A.、Krylov, A. S.、Vtyurin, A. N.、Dubrovskiy, A. A.、Laptash, N. M.
NSTL
Elsevier
