Mean polarizabilities and second and third virial coefficients of the gases C2H4, C2H6, and SF6

Interferometric measurements of the dipole polarizability α of molecules between 300 K and 1100 K

“…Because of the small pressures used in this work (p < 1.5 x 105 Pa) the power series (14) can be truncated after the term B* without any loss of precision [34]. B*(~o, T) is the difference between the second refractivity virial coefficient bR(CO, T) and the second thermodynamic virial coefficient B(T) [33] B*(co, T) = ba(cO, T) -B(T).…”

Estimation of third virial coefficients at low reduced temperatures

“…Wagner and co-workers provide values of this property for all the substances: argon [12], carbon dioxide, [13], ethane [14], ethylene [15], methane [16], nitrogen [17] and oxygen [18]. We also compare our results to accurate experimental third virial coefficients for argon [19,20], nitrogen [21], ethylene [22,23], carbon dioxide [24,25], oxygen [26,27], methane [28,29] and ethane [30][31][32][33]. Second virial coefficients come from the same sources, but experimental saturated densities and vapor pressures are from Gilgen et al [34], Nowak et al [35], Nowak et al [36], Duschek et al [37], Wagner and de Reuck [38], Kleinrahm and Wagner [39] and Funke et al [40].…”

CHAPTER 1. Volumetric Properties: Introduction, Concepts and Selected Applications

“….denote the first, second, third, etc., refractivity (or optical) virial coefficient. [211][212][213][214][215] The first refractivity virial coefficient is proportional to the mean polarisability volume La/4pe 0 , where a is the electric polarisability of a molecule, and e 0 is the permittivity of vacuum. Replacing the density in Equation (1.220) with use of the virial equation in density, one obtains:…”