The isotropic temperature-dependent potential describing the binary interactions in gaseous WF6 and MoF6

The parameters of the temperature-dependent isotropic potentials of binary WF6-WF6 and MoF6-MoF6 interactions are obtained from the experimentally measured second virial coefficient B and viscosity eta of these gases. The parameters of the ground state (equilibrium distance r(m) and the potential depth well epsilon at T = 0 K, together with the repulsive parameter n and the temperature dependence r(m)((eff))(T)) are defined and can be used to calculate any potential-dependent property of the two gases. The measured viscosities of the WF6-UF6 and MoF6-UF6 mixtures at T = 354 K are reproduced within the experimental error using earlier defined potential parameters for UF6.