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Turbidity very near the critical point of methanol-cyclohexane mixturesThe turbidity of a critical mixture of methanol and cyclohexane has been measured extremely close to the consolute point. The data span the reduced-temperature range between 10 to the -7th and 10 to the -3d, which is two decades closer to Tc than previous measurements. In this temperature range, the turbidity varies approximately as 1nt, as expected from the integrated form for Ornstein-Zernike scattering. A thin cell (200-micron optical path) with a very small volume (0.08 ml) was used to avoid multiple scattering. A carefully controlled temperature history was used to mix the sample and to minimize the effects of critical wetting layers. The data are consistent with a correlation-length amplitude of 3.9 plus or minus 1.0 A, in agreement with the value 3.5 A calculated from two-scale-factor universality and heat-capacity data from the literature.
Document ID
19840047604
Document Type
Reprint (Version printed in journal)
Authors
Kopelman, R. B. (Maryland Univ. College Park, MD, United States)
Gammon, R. W. (Maryland, University College Park, MD, United States)
Moldover, M. R. (National Bureau of Standards Washington, DC, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1984
Publication Information
Publication: Physical Review A - General Physics, 3rd Series
Volume: 29
ISSN: 0556-2791
Subject Category
THERMODYNAMICS AND STATISTICAL PHYSICS
Funding Number(s)
CONTRACT_GRANT: NASA ORDER H-27954-B
CONTRACT_GRANT: NASA ORDER C-62861-C
Distribution Limits
Public
Copyright
Other