High-pressure variable temperature Raman studies on hexamethyl benzene crystals
β Scribed by J. S. Bodenheimer; W. F. Sherman; G. R. Wilkinson
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 343 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0377-0486
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β¦ Synopsis
Abstract
The Raman spectra of hexamethyl benzene and HMBβd~18~ have been recorded as a function of temperature between 4 K and 400 K and as a function of pressure up to 8kbar. In the lowβfrequency region, librational and torsional modes have been distinguished. The spectra indicate a phase transition to a highβpressure phase IV. The polarized infrared spectra of single crystals have also been observed at different temperatures.
π SIMILAR VOLUMES
Vibrational Raman studies on Cse up to 18.0 GPa and between 4 and 360 K are presented. No significant changes are observed up to IO GPa; mode-Grthteisen parameters are calculated. The low pressure, temperature-dependent Raman spectrum shows a sharp shift in peak position and width at 240 K. This is
Raman spectra of liquid and crystalline CHzBrCHzBr have been measured at hydrostatic pressures up fo 120 kbar and at 300 K in a gasketed diamond anvil cell. The pressure dependence of eight intramolecular and three intermolecular (lattice) modes is reported. All intramolecular vibrations show a chan