Spatial Fermi gas

Solubility The Spatial Fermi Gas and the Dual-Mode Sorption Model)... 

If we assume that not more than one solute molecule can occupy a site at one time, the solute molecules will obey statistics of the Fermi-Dirac type an ensemble of solute particles obeying this principle is termed a spatial Fermi gas [54], The fundamental thermodynamic relations, such as the equilibrium distribution function, the free energy, the pressure dependence of the concentration of solute in contact with the ideal-gas phase, and the equation of state have been established in closed form for a spatial Fermi gas of identical as well as different particles [54]. Some of the results shall be review here. 

At equilibrium between the spatial Fermi gas and the ideal gas of the same molecules the mean number e, of solute molecules at site j is [54]... 

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