Is the thermodynamic behavior of the noble fluids consistent with the   Principle of Corresponding States?
  The applicability of the Principle of Corresponding States (PCS) for the noble fluids is discussed. We give the thermodynamic evidences for the dimerization of the liquid phase in heavy noble gases like argon, krypton etc. which manifest itself in deviation from the PCS. The behavior of the rectilinear diameter of the entropy and the density is analyzed. It is shown that these characteristics are very sensitive to the dimerization process which takes place in the liquid phase of heavy noble gases. 
V.L. Kulinskii, N.P. Malomuzh and O.I. Matvejchuk