4 Unless documented otherwise, the following units are used
5 - angstrom
for all distances
6 - \f$ \frac{kcal}{mol \unicode[serif]{xC5}}\f$
for forces/derivatives
7 - \f$\frac{kcal}{mol}\f$
for energies
8 - radians
for angles. All angles are counterclockwise.
9 - all charges are in units of the elementary charge
10 - all times are in femtoseconds