Study on Structural and Thermodynamic Properties of Solid Nitrogen with HCP Structure by Statistical Moment Method

Abstract

The paper presents the analytic expressions of nearest neighbor distance between two particle, Helmholtz free energy, thermodynamic and structural quantities for hcp crystals on the basis of the statistical moment method (SMM) taking into account of vibrational motion of particles, Helmholtz free energy and thermodynamic quantities for hcp crystals on the basis of the self-consistent field method (SCFM) taking into account of molecular motion. The theoretical results are applied to calculate numerically for hcp-N₂. Some numerical results are compared with experiments and other calculations.