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  • 1 Aristotle University of Thessaloniki Physics Dept. GR 54124 Thessaloniki Greece GR 54124 Thessaloniki Greece
  • | 2 Kliment Ohridski University of Sofia Faculty of Chemistry 1 James Bourchier Str. 1126 Sofia Bulgaria 1 James Bourchier Str. 1126 Sofia Bulgaria
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Abstract  

The kinetics of the α-β phase transition of HgI2 were investigated by isothermal and non-isothermal differential scanning calorimetry. The effective activation energy of the transition, 41540 kJ mol-1, was determined applying the methods of Kissinger and Ozawa. The transition kinetics were described by the Johnson-Mehl-Avrami model and the value of the Avrami exponent n was found to range from high values (n>3) at the early stages to lower values at later stages of the transformation, with an average value of 2.

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