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Raman spectra of caesium and rubidium tetrachloroaluminates in the solid state
Author(s) -
Rubbens A.,
Wallart F.,
Barbier P.,
Mairesse G.,
Wignacourt J. P.
Publication year - 1978
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.1250070505
Subject(s) - raman spectroscopy , rubidium , isostructural , chemistry , caesium , polyatomic ion , ammonium , ion , solid state , crystallography , analytical chemistry (journal) , spectral line , inorganic chemistry , potassium , crystal structure , organic chemistry , physics , astronomy , optics
Raman spectra of both polycrystalline samples and single crystals of CsAlCl 4 and RbAlCl 4 (space group Pnma ( D 2 h 16 )) have been recorded in the temperature range 298–80 K. As for the other chloroaluminates, we find the four characteristic bands of the tetrahedral AlCl 4 −anion at 353, 128, 485–503, 180–187 cm −1 and 356, 127, 486–505 and 180–187 cm −1 , respectively, for the salts CsAlCl 4 and RbAlCl 4 . The Raman spectra of single crystals of these two compounds are similar and show that these two salts are isostructural. An assignment of the observed bands is proposed. The results are compared with those for the polyatomic cation (nitrosyl and ammonium) tetrachloroaluminates.