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

YURTSEVEN H. H., Desticioglu M.

HIGH TEMPERATURE MATERIALS AND PROCESSES, cilt.32, sa.2, ss.189-194, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 2
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1515/htmp-2012-0038
  • Dergi Adı: HIGH TEMPERATURE MATERIALS AND PROCESSES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.189-194
  • Anahtar Kelimeler: Heat capacity, alpha-beta transition, quartz, INCOMMENSURATE PHASE, NEUTRON-SCATTERING, SHOCK EXPERIMENTS, X-RAY
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.