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Electrostriction of Near-Critical SF6 in Microgravity



G A. Zimmerli, R A. Wilkinson, R A. Ferrell, Michael R. Moldover


We used interferometry to measure the electric-field-induced (I.e., electrostrictive) increase of the density of sulfur hexafluoride near its critical point. The results at the temperatures Tc + 5 mK, Tc + 10 mK, and Tc + 30 mK, with Tc = 319 K, agree with a calculation based on the Clausius-Mossotti relation and the restricted cubic model nist-equation of state. These measurements were performed in microgravity so that the electrostrictive density changes (
Physical Review Letters
No. 26


critical phenomena, critical point, electrostriction, equation of state, sulfur hexafluoride
Created June 1, 1999, Updated February 17, 2017