In the present paper we study the effect of high hydrostatic pressure (up to 16 GPa) on the Raman spectrum of Lu 3 Al 5 O 12 single crystals. Lu 3 Al 5 O 12 belongs to the crystal family of rare earth garnets (Re 3 Al 2 (AlO 4 ) 3 , Re: Gd, Tb, Dy, Er, . . .). These materials crystallize with the bo
High-pressure Raman study of dibromomethane
✍ Scribed by J.P. Itié; M. Châtelet
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 328 KB
- Volume
- 221
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Raman spectra of pressure-induced crystalline CHzBrz have been measured at room temperature for pressures up to 240 kbar in a gasketed diamond anvil cell. The pressure dependence of the internal and lattice modes are reported and discussed. A phase transition appears between 170 and 240 kbar. This high-pressure solid phase contains a new lattice mode and can be maintained with decreasing pressure.
📜 SIMILAR VOLUMES
## Abstract High‐pressure Raman spectra of fullerite, a solid form of C~60~, were measured at pressures up to 4 GPa and room temperature. A change of slope (d__v__/d__P__) of the frequency‐pressure plots for the __A__~g~ pentagonal pinch mode and the __A__~g~ breathing mode was observed at 1.3 GPa,
The pressure dependence of the Raman spectra of was investigated up to 15.5 GPa. The anti-ferrodistortive SrTiO 3 cubic-tetragonal phase transition (phonon condensation at the R point of the Brillouin zone) occurs at about 6 GPa. The strong, broad bands, present under ambient conditions, sharpen and