You may be interested in the article: "Dielectric Properties of SF6-CClF3 Gas Mixtures at Nearly Liquid Densities", by Ralph Nelson (me) and Robert Cole in J. Chem Phys., (May 1971) Vol 54, No 9, 4033-38. I did the measurements in Bob Cole's lab, and he did the physics, so I can't elaborate on that part. Best wishes. This is an important area to study and to understand better.
Note that I was across the river, at Middlebury College in 1974