Dielectric and pressure virial coefficients of imperfect gases: Hexadecapolar system

Abstract

Dielectric and pressure virial coefficients of SF₆ have been determined at 323.3, 348.3, and 373.9 K. Attributing the temperature dependent contribution of the second dielectric virial coefficient to dipole moments induced in one molecule by the hexadecapole moment of a second gives (5.40±0.7)×10⁻⁴¹ esu · cm⁴ for the molecular hexadecapole moment of SF₆. The hexadecapole moment of SF₆ derived from pressure second virial coefficients is (5.75±0.3)×10⁻⁴¹ esu · cm⁴.