Low Temperature Physics: 48, 165 (2022); https://doi.org/10.1063/10.0009298
Fizika Nizkikh Temperatur: Volume 48, Number 2 (February 2022), p. 185-190    ( to contents , go back )

Polymorphic transitions in highly compressed molecular nitrogen. Application of Mayer group expansion for solids

E. S. Yakub

Cybernetics Department, Odessa National Economic University, Odessa 65082, Ukraine
E-mail: eugene.yakub@gmail.com

L. N. Yakub

Thermophysics Department, Odessa National Academy of Food Technologies, Odessa 65039, Ukraine
pos Анотація:585

Received April 24, 2021, published online December 25, 2021


We applied the Mayer group expansion method for solids to predict locations of the polymorphic phase transitions lines between molecular ε and ζ phases, as well as between molecular ζ phase and polymeric cubicgauche-phase in highly compressed nitrogen solid. A simple potential model is proposed and its parameters are determined using known ab initio energy calculations for the molecular α phase. The results are compared with existing experimental data and the influence of intermolecular correlations on the temperature dependence of phase transition pressures is estimated.

Key words: solid nitrogen, polymeric nitrogen, polymorph transition.

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