Second virial coefficients for Ar
J. M. H. Levelt Sengers, M. Klein, J. S. Gallagher
T /K    B / cm3.mol-1
340       -8.7
360       -5.8
400       -1.1
411.52     0.0
450        3.4
500        6.9
600       11.9
700       15.4
800       17.8
900       19.7
1000      21.1
1100      22.2