The melting curve of Sodium: a theoretical approach

Details The melting curve of Sodium: a theoretical approach The melting curve of Sodium: a theoretical approach

2009-05-07

arxiv.org/abs/0905.1140v1

Physics

Chemical Physics

Scientific paper

New model describing the pressure effect on the melting temperature is proposed by using four assumptions. One, the average wavelength of the phonon vibration at the Debye temperature corresponds to the length of the unit cell. Two, the phonon vibration at the melting temperature is in self-resonance with the lattice vibration of the surface atomic/molecular layer. Three, the phonon wavelength ratio of the Debye and the melting temperature does not be affected by the pressure. Four the pressure reduces the anharmonic part of the vibration. The relevant equations are derived and tested against the experiments of sodium with positive result.

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