The follow information is reproduced from:

"Chenoweth, K.; van Duin A.C.T.; Persson, P.; 
Cheng M.J.; Oxgaard, J.; Goddard W.A. 
J. Phys. Chem. C, 2008, 112, 14645-14654."

- The ReaxFF force field parameters have been fit 
to a large quantum mechanics (QM) training set containing over 700 
structures and energetics related to bond dissociations, angle 
and dihedral distortions, and reactions between hydrocarbons 
and vanadium oxide clusters. In addition, the training set 
contains charge distributions for small vanadium oxide clusters 
and the stabilities of condensed-phase systems 
including V2O5, VO2, and V2O3 in addition to metallic V (V0).