Fugacity of condensed media
  Appearance of physical properties of objects is a basic for their detection in a media. Fugacity is a physical property of objects. Definition of estimations fugacity for different objects can be executed on model which principle of construction is considered in this paper. The model developed by us well-formed with classical definition fugacity and open up possibilities for calculation of physical "fugacity" for elementary and compound substances. 
Leonid Makarov, Peter Komarov