The Orientational Disordering and Thermodynamic Properties of Simple Molecular Crystals
V. A. SlusarevPhysico- Technical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovYu. A. FreĭmanPhysico- Technical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovI. N. KrupskiĩPhysico- Technical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovI. A. BurakhovichPhysico- Technical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
1972en
ABI
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Abstract The Bogolyubov variational method has been applied to the investigation of the ordered phase thermodynamics for N 2 , CO, N 2 O, and CO 2 crystals in the molecular field approximation. The libron heat capacity, the ordering parameter, and the libration excitation energy have been calculated for the whole range of the ordered phase. The orientational disordering temperature has also been estimated. The theoretical results have been compared with experimental data.
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