Surface excess from fit and simulations
          From Gibbs fit
epsilon_AB [epsilon] sorption [sigma-2]
            0.7000       0.0442529398
            0.4500       0.1342264164
            0.1900       0.2387219946
        From Simulations
epsilon_AB [epsilon] sorption [sigma-2]
            0.2630       0.1941392473
            0.2000       0.1981325269
            0.3260       0.1718904570
            0.3890       0.1515353495
            0.4530       0.1502690860
            0.5160       0.1290264785
            0.5790       0.1131493280
            0.6420       0.0880232527
            0.7050       0.0676439516
            0.7680       0.0513178763
            0.8320       0.0334323925
            0.8950       0.0228915323
            0.9580       0.0037845430
            0.2000       0.1987326613
            0.4530       0.1454408602
            0.7050       0.0759924731
