Critical Behaviour of the Heat Capacity Near the alpha-beta Phase Transition in Quartz

YURTSEVEN H. H., Desticioglu M.

HIGH TEMPERATURE MATERIALS AND PROCESSES, vol.32, no.2, pp.189-194, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 2
  • Publication Date: 2013
  • Doi Number: 10.1515/htmp-2012-0038
  • Journal Name: HIGH TEMPERATURE MATERIALS AND PROCESSES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.189-194
  • Keywords: Heat capacity, alpha-beta transition, quartz, INCOMMENSURATE PHASE, NEUTRON-SCATTERING, SHOCK EXPERIMENTS, X-RAY
  • Middle East Technical University Affiliated: Yes

Abstract

The alpha-beta transition ( T-Q = 578 degrees C) is studied in quartz by analyzing the experimental heat capacity C-p data taken from the literature, using a power-law formula. Values of the critical exponent alpha for C-p are extracted below and above T-Q, which describe the alpha-beta transition as a second order transition in quartz. The alpha values obtained here are compared with the predictions of the theoretical models.