Σldritch - 9-4-2019 at 11:18
Apparently liquid iodine has a relative permittivity well over 100:
https://www.honeywellprocess.com/library/marketing/tech-spec...
How is this possible for such a symmetric molecule as elemental iodine? As i understand larger atoms should give higher permittivity but surely the
effect is not that pronounced. According to the same source selenium only has a relative permittivity of around 7.
unionised - 9-4-2019 at 12:04
I'd expect it to have a very high polarisability, but over 100 seems too high.
It's not going to be easy to measure and any impurity is likely to screw up the measurement.
I'd want a second reference to the value before I tried to explain it.
This
http://delibra.bg.polsl.pl/Content/16824/P-321_1933_Aug.pdf
says it's about 11 to 12 depending on temperature
Dielectric constant of liquid iodine. A. J agielsk i (Bull. Acad. Polonaise, 1932, A, 327—335).
—Vais, from 11-08 at 118-1° to 12-98 at 167-7°, with
a mean error of 2%, have been obtained. F. L. U.
I strongly suspect that the figure of 118 should be 11.8
[Edited on 9-4-19 by unionised]
Σldritch - 9-4-2019 at 12:12
That does seem like the most logical explanation even though it is written as 118.0 twice.