Optical Measurements of Gravitationally Induced Concentration Gradients near a Liquid-Liquid Critical Point
- 21 July 1975
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 35 (3), 168-170
- https://doi.org/10.1103/physrevlett.35.168
Abstract
Using a laser-beam deflection technique and a 1-mm-high sample, we have determined, for the first time, the magnitude of the steady-state concentration gradient due to the gravitational field in a binary mixture near a consolute critical point. The data have been taken, as a function of , along the critical isochore. A strong -type divergence is observed. A comparison with the values calculated by use of our own set of osmotic compressibility data is also presented.
Keywords
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