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Raman spectra of single crystals of α‐P 4 S 3
Author(s) -
Burns Gary R.,
Rollo Joanne R.,
Syme Roderick W. G.
Publication year - 1988
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.1250190508
Subject(s) - phonon , raman spectroscopy , chalcogen , chemistry , lattice (music) , spectral line , polarization (electrochemistry) , analytical chemistry (journal) , materials science , crystallography , condensed matter physics , molecular physics , optics , physics , astronomy , acoustics , chromatography
Polarization data for the Raman‐active k = 0 phonons of single crystals of α‐P 4 S 3 have been measured at 10 K and at high resolution. Of the 24 external and 60 internal phonons expected for the D 2h factor group of α‐P 4 S 3 we have observed 16 external and 38 internal phonons. The effect of the layer lattice has been proposed to explain the absence of some expected phonon structure. The present work together with an earlier study of the pressure and temperature dependence of the Raman‐active phonons have enabled the 4 A 1 , A 2 and 5 E internal molecular modes to be assigned. The resulting normal coordinates give good fits for the Raman‐active bands of the heavy isotope P 4 32 S 2 34 S and for the mixed chalcogen species P 4 S 3 − x Se x .