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harmonic bonds harmonic angles fourier dihedrals harmonic impropers
OpenFF Sage 2.3.0
FreeModern SMIRNOFF force field from the Open Force Field Initiative. Uses AM1-BCC charges, Fourier dihedrals, and Lorentz-Berthelot combining rules.
Class 1
Lorentz-Berthelot mixing
1-4 LJ: 0.5
1-4 Coul: 0.833333
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