Premium
Vibrational spectra of R(PO 3 ) 3 metaphosphates (R = Ga, In, Y, Sm, Gd, Dy)
Author(s) -
Ilieva Dora,
Kovacheva Daniela,
Petkov Christo,
Bogachev Georgi
Publication year - 2001
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.753
Subject(s) - metaphosphate , chemistry , raman spectroscopy , polyphosphate , crystallography , spectral line , bond length , force constant , molecular vibration , analytical chemistry (journal) , crystal structure , molecule , phosphate , physics , organic chemistry , chromatography , astronomy , optics
A series of R(PO 3 ) 3 (R = Ga, In, Y, Sm, Gd, Dy) metaphosphate crystals representing four different structural types were prepared and their vibrational spectra recorded. The distribution of internal and external chain modes was obtained taking into account the configuration (site symmetry) of the polyphosphate anions in the corresponding structures. The spectra presented reveal that the P—O − force constants are very sensitive to both the coordination of oxygen atoms and POP bond angles. The spectra of crystalline R(PO 3 ) 3 were compared with data for glassy metaphosphates. It was found that decreasing the size of R(III) cation leads to different structural effects in glasses and crystals of the same composition. Copyright © 2001 John Wiley & Sons, Ltd.