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Vibrational modes of rare‐earth formates
Author(s) -
Silva E. N.,
Moura M. R.,
Ayala A. P.,
Guedes I.,
Polla G.,
Vega D. R.,
Tobia D.,
Saleta M. E.
Publication year - 2009
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2207
Subject(s) - raman spectroscopy , formate , rare earth , phonon , lattice vibration , softening , chemistry , lattice (music) , crystallography , computational chemistry , condensed matter physics , materials science , mineralogy , physics , organic chemistry , optics , acoustics , composite material , catalysis
In this work we investigate the room‐temperature Raman spectra of several rare‐earth [RE(HCOO) 3 ; RE = La, Pr, Nd, Gd, Tb and Y] formates. Polarized measurements were carried out for La(HCOO) 3 yielding the observation of most of the Raman‐active phonons predicted by group theory analysis. The respective assignment is given based on the formate vibrations and correlations with previous results in other RE(HCOO) 3 systems. The wavenumber ‘softening’ observed when RE goes from Y to La is accounted for the lattice expansion. Copyright © 2009 John Wiley & Sons, Ltd.