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Raman study of three polytypes of PbI 2
Author(s) -
Khilji M. Y.,
Sherman W. F.,
Wilkinson G. R.
Publication year - 1982
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.1250130206
Subject(s) - raman spectroscopy , brillouin zone , dispersion (optics) , phonon , materials science , phase (matter) , iodide , analytical chemistry (journal) , chemistry , crystallography , mineralogy , optics , condensed matter physics , inorganic chemistry , physics , organic chemistry , chromatography
Abstract Raman spectra of three polytypes of lead iodide (2H, 4H and 6H) have been investigated as a function of temperature at ambient pressure. The band assignments have been carried out on the basis of folding of 2HPbI 2 phonon dispersion curves in the Brillouin zone. The temperature induced changes in the Raman spectra are interpreted in terms of an interpolytypic phase transformation (at 415 K) and photodecomposition at 470 K.