A temperature variation study of the nuclear quadruple resonance (NQR) frequencies for the two resonance lines in 1,2,4,5-tetrabromobenzene was carried out in the range 77-300K. The far-infrared spectrum of 172,4,5-telrabromobenzene was recorded and the low-frequency mirational modes noted. From the
The lattice vibrations of 1,2,4,5-tetrabromobenzene
β Scribed by E. Burgos; H. Bonadeo
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 228 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The Iatticevibrations of 1,2,4S_tetrabromobeilzene inits #3 and 7 phases have been studied using Raman and far infrared spectroscopy. The results are compared with CalcuIations based on the atom-atom interaction model. In spite of the similar crystal structures, both the spectra and the calculated freqtizncies of the two phases are widely different.
π SIMILAR VOLUMES
Infrared reflectivity spectra of CdIn,Se, single crystals are measured at room temperature in the wavenumber range from 180 to 4000 cm-' for the polarization directions E I c and E 11 [112]. The spectra reveal two vibrational modes with nearly the same frequencies for both polarization directions. T