Axilrod-Teller interaction
The Axilrod-Teller interaction for three-body interactions is given by (Ref. 1):
- 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_{123}= C\frac{3 \cos(\gamma_1)\cos(\gamma_2) \cos(\gamma_3) +1}{r_{12}^3 r_{23}^3 r_{31}^3}}
where 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_{ij}} are the lengths of the sides and 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 \gamma_i} are the angles of the triangle formed by the three atoms.