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The  α - β  transition ( T   Q   = 578°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  α  for  C   p   are extracted below and above  T   Q  , which describe the  α - β  transition as a second order transition in quartz. The  α  values obtained here are compared with the predictions of the theoretical models.

Critical Behaviour of the Heat Capacity Near the α - β Phase Transition in Quartz