PHYSICAL PROPERTIES AND VIRIAL COEFFICIENTS OF SULFUR HEXAFLUORIDE

On the basis of new experimental PVT data and of selected literature values, this paper derives a Martin-Hou equation of state which correlates, within ±0.18% standard deviation, data in the experimental ranges of 25-130°, 10-75 bars, and 1.05-13 cc/g. A vapor pressure equation with six constants describes the data within ±0.18% standard deviation between -45 and +45.64°, the critical temperature. A density equation with five constants correlates data between -41 and +42° with a per cent standard deviation of ±0.10%. The Martin-Hou equation serves to compute virial coefficients and a variance-covariance matrix treatment indicates their probable accuracy.