𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Far infrared phonons of solid iodine under pressure

✍ Scribed by Leonardo Tassini; Federico A. Gorelli; Lorenzo Ulivi

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
189 KB
Volume
378
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Far infrared absorption spectra of solid iodine in the region 40-150 cm Γ€1 have been measured up to about 10 GPa, in a diamond anvil cell. The pressure evolution of the frequency position and intensity of the two B 1u and B 2u lattice modes of the Cmca iodine crystal has been measured for the first time. The much slower increase with pressure of the experimental B 1u frequency, comparing with the calculated one, is caused, analogously to the similar behavior of the A g Raman libron, by the gradual molecular dissociation. The increase with pressure of the intensity of the modes can be correlated to the charge delocalization, preceding the insulator-metal transition.

πŸ“œ SIMILAR VOLUMES

Far-infrared spectra of solid CH4 under
Far-infrared spectra of solid CH4 under high pressure
✍ J. Orbriot; F. FondΓ©re; Ph. Marteau; H. Vu; K. Kobashi πŸ“‚ Article πŸ“… 1978 πŸ› Elsevier Science 🌐 English βš– 477 KB

Far-infrared spectra of solid CH4 have been recorded at 4.2 K under pressure, P = 0.4 kbar (phase Ii) and P = 4.5 kbar (phase III). In phase IL two bands have been observed at 53 and 76 cm-', while in phase IIi three bands have been seen at 65,70 and 94 cm-'\_ Lattice dynamical calcr?htions for the