The susceptibility critical exponent for a nonaqueous ionic binary mixture near a consolute point
Kai C. ZhangInstitute for Physical Science and Technology, University of Maryland at College Park, College Park, Maryland 20742Matthew E. BriggsInstitute for Physical Science and Technology, University of Maryland at College Park, College Park, Maryland 20742Robert W. GammonInstitute for Physical Science and Technology, University of Maryland at College Park, College Park, Maryland 20742J. M. H. Levelt SengersThermophysics Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce, Gaithersburg, Maryland 20899
1992en
ABI
Abstract
We report turbidity measurements of a nonaqueous ionic solution of triethyl n-hexylammonium triethyl n-hexylboride in diphenyl ether. A classical susceptibility critical exponent γ=1.01±0.01 is obtained over the reduced temperature range 10−4≤ t≤10−1. The best fits of the sample transmission had a standard deviation of 0.39% over this range. Ising and spherical model critical exponents are firmly excluded. The correlation length amplitude ξ0 from fitting is 1.0±0.2 nm which is much larger than values found in neutral fluids and some aqueous binary mixtures.
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