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) is given by

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

where

• $r:=|\mathbf {r} _{1}-\mathbf {r} _{2}|$
• $\Phi _{12}(r)$ is the intermolecular pair potential between two particles or sites
• Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \sigma } is the diameter (length), i.e. the value of Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle r} at which Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \Phi_{12}(r)=0}

The first term is an exponentioal 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.