Temperature and Pressure Effect on the Raman Frequencies Calculated from the Crystal Volume in the gamma-Phase of Solid Nitrogen
JOURNAL OF APPLIED SPECTROSCOPY, vol.82, no.4, pp.700-704, 2015 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 82 Issue: 4
- Publication Date: 2015
- Doi Number: 10.1007/s10812-015-0166-0
- Journal Name: JOURNAL OF APPLIED SPECTROSCOPY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.700-704
- Keywords: Raman frequency, molar volume, mode Gruneisen parameter, gamma-phase, solid N-2, GRUNEISEN PARAMETERS, SPECTRA
- Middle East Technical University Affiliated: Yes
Abstract
The temperature and pressure dependences of the Raman frequencies of the lattice modes (E-g and B-1g modes) and of an internal mode (2331 cm(-1)) are predicted using the observed molar volume data from the literature in the gamma-phase of solid N-2. This calculation is carried out by means of the mode Gruneisen parameter of each Raman mode in the gamma-phase of solid nitrogen. Our results show that the predicted Raman frequencies of the E-g mode increase as the pressure increases. The Raman frequencies of the other lattice mode (B-1g) and the internal mode (2331 cm(-1)) decrease with increasing pressure due to their negative Gruneisen parameters in the gamma-phase of solid N-2. The temperature effect on the Raman frequencies is negligibly small.