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 Average unsigned error in PM7      HoF:     0.46 kcal/mol, for    1 solids
 
 Average unsigned error in PM6-D3H4 HoF:     0.81 kcal/mol, for    1 solids 
     #     GUI   Heat of formation (Kcal/formula unit) Geometry        Species
                    Ref.        PM7     PM6-D3H4      PM7 PM6-D3H4 
    663  (JSmol)         0.0            -0.5            -0.8           29.3       25.8   Argon (Ar) (ICSD 77918)