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Vibrational spectra of transition metal phosphosilicides MSi 4 P 4 (M = Fe, Ru, Os)
Author(s) -
Kreisel J.,
ChaixPluchery O.,
Perrier Ch.,
Vincent H.,
Lucazeau G.,
Madar R.
Publication year - 1999
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/(sici)1097-4555(199905)30:5<417::aid-jrs389>3.0.co;2-5
Subject(s) - raman spectroscopy , octahedron , steric effects , tetrahedron , chemistry , transition metal , crystallography , metal , molecular vibration , spectral line , lattice (music) , stereochemistry , crystal structure , physics , optics , biochemistry , organic chemistry , astronomy , acoustics , catalysis
MSi 4 P 4 compounds (M = Fe, Ru, Os) were studied at 300 K by Raman and IR spectroscopy. The low symmetry and the absence of a center of inversion were confirmed. The low‐wavenumber modes are downshifted after substitution of Ru and Os for Fe. These modes were assigned to relative motions of octahedra and tetrahedra (SiP 4 or PSi 4 ) units. The upshift of high‐energy modes was related to electronic transfer between the metal and the Si–P host lattice and to steric effects due to the atomic size increase from Fe to Os. Copyright © 1999 John Wiley & Sons, Ltd.