“…(a) Second virial coefficient as a function of temperature, (b) Deviations of second virial coefficient from the quantum mechanics calculation by Hellmann et al; solid line, this work; dotdash line, Hurly et al; broken line,Lemmon and Span;medium dash double dot line, Kaplun et al; dotted line, Meng et al; box solid, Beattie et al; tilted window, Michels et al; triangle up open, Whalley et al; triangle left pointing with plus sign, Sengers et al; triangle solid down, Rentschler et al; tilted square open, Schramm et al. ; triangle right-pointing open, Schmiedel et al; hexagon solid, Schramm and Müeller; star solid, Dunlop et al; window, Hohm and Trüemper; symmetry, Janzen et al …”