Solid state vibrational spectroscopy—III[1] The infrared and raman spectra of the bismuth(III) oxide halides

The i.r. and Raman spectra of the bismuth oxide halides, BiOCl, BiOBr, and BiOI, have been recorded over the range 40–600 cm−1. Four bands are observed in the i.r. spectra of all three compounds in agreement with the predictions based on the D4h7 space group. Six bands are expected in the Raman spectra of all three compounds. Only the spectrum of BiOBr contains six resolved Raman bands, and an assignment is proposed for the observed bands.