Calculation of the soft-mode frequency for the alpha - beta transition in quartz

YURTSEVEN H. H., Tari O.

OPTIK, vol.127, no.10, pp.4470-4472, 2016 (SCI-Expanded, Scopus)

  • Publication Type: Article / Article
  • Volume: 127 Issue: 10
  • Publication Date: 2016
  • Doi Number: 10.1016/j.ijleo.2016.01.167
  • Journal Name: OPTIK
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4470-4472
  • Keywords: Soft mode, Alpha-beta transition, Quartz, DISPLACIVE PHASE-TRANSITION, MOLECULAR-DYNAMICS, SCATTERING, BEHAVIOR, SILICA, SPECTROSCOPY, RANGE
  • Middle East Technical University Affiliated: Yes

Abstract

The alpha - beta structural transition occurs in quartz at T-c = 846 K. The frequency of the soft mode associated with the volume increase, decreases with increasing temperature as the transition temperature is approached.