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# Born-Huggins-Meyer potential

The Born-Huggins-Meyer potential (although looking at the authors/publications perhaps it would be more precisely known as the Born-Meyer-Huggins potential) [1] [2] [3] is given by [4]

$\Phi_{12}(r) = A \exp \left[ B(\sigma - r) \right] - \frac{C}{r^6} - \frac{D}{r^8}$

where

• $r := |\mathbf{r}_1 - \mathbf{r}_2|$
• $\Phi_{12}(r)$ is the intermolecular pair potential between two particles or sites
• $\sigma$ is the diameter (length), i.e. the value of $r$ at which $\Phi_{12}(r)=0$

The first term is an exponential repulsion, followed by dipole-dipole and dipole-quadrupole dispersion terms. This potential is often augmented with a Coulombic interaction.

This potential is often used to study alkali halides.