Structural phase transitions in pentacosane C25H52

Mukherjee, Prabir K.
March 2007
Journal of Chemical Physics;3/21/2007, Vol. 126 Issue 11, p114501
Academic Journal
The pentacosane undergoes a series of structural phase transitions in addition to the melting transition according to an x-ray scattering study. A phenomenological theory is developed to describe the structural phase transitions between different phases observed in pentacosane. We present a detailed analysis of the different phases and analyze the temperature anomalies of the elastic constants and heat capacity. The thermodynamic anomalies on the different phase transitions are described by the coupling between the order parameters and the elastic strains. The theoretical predictions are found to be in good qualitative agreement with experimental results.


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