Pressure Dependence of the Raman Modes Related to the Phase Transitions in Cyclohexane

YURTSEVEN H. H., Cebeci A. M.

ACTA PHYSICA POLONICA A, vol.127, no.3, pp.744-747, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 127 Issue: 3
  • Publication Date: 2015
  • Doi Number: 10.12693/aphyspola.127.744
  • Journal Name: ACTA PHYSICA POLONICA A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.744-747
  • Middle East Technical University Affiliated: Yes

Abstract

The pressure dependence of the Raman frequencies for the v(21) mode is studied by using the volume data at room temperature close to the transitions among the phases of III, IV and V in cyclohexane. By determining the pressure dependence of the mode Gruneisen parameter gamma T in the phases and taking the average values, the Raman frequencies of those modes associated with the phase transitions are predicted through the volume data in cyclohexane. Our predicted Raman frequencies agree with those observed experimentally in this organic molecule. The Raman frequencies of the other modes can be calculated in cyclohexane and also in some molecular crystals using the method given here.