Abstract
We present static turbidity and dynamic light-scattering measurements near the critical double point of a mixture of secondary butyl alcohol, tertiary butyl alcohol, and water. At the critical double point of this mixture an upper two-phase miscibility loop merges with a lower two-phase region. When temperature is used as a field variable to describe the critical behavior of the turbidity and correlation length of the mixture, nonuniversal behavior is seen in both the critical exponents and amplitudes. If, however, the tBA concentration difference from the critical curve is used, universality is found in both exponents and amplitudes. We thus term this concentration difference to be the relevant parameter for proper description of the critical behavior and, following Griffiths and Wheeler [Phys. Rev. A 2, 1047 (1970) ], show this relevant parameter was determined by it never having tangential paths of approach to the critical curve.
| Original language | English |
|---|---|
| Pages (from-to) | 1608-1615 |
| Number of pages | 8 |
| Journal | Journal of Chemical Physics |
| Volume | 89 |
| Issue number | 3 |
| State | Published - 1988 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
Cite this
Light-scattering studies of a ternary mixture : Comparison of field variables for critical phenomena description. / Sidebottom, David L.; Sorensen, C. M.
In: Journal of Chemical Physics, Vol. 89, No. 3, 1988, p. 1608-1615.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Light-scattering studies of a ternary mixture
T2 - Comparison of field variables for critical phenomena description
AU - Sidebottom, David L.
AU - Sorensen, C. M.
PY - 1988
Y1 - 1988
N2 - We present static turbidity and dynamic light-scattering measurements near the critical double point of a mixture of secondary butyl alcohol, tertiary butyl alcohol, and water. At the critical double point of this mixture an upper two-phase miscibility loop merges with a lower two-phase region. When temperature is used as a field variable to describe the critical behavior of the turbidity and correlation length of the mixture, nonuniversal behavior is seen in both the critical exponents and amplitudes. If, however, the tBA concentration difference from the critical curve is used, universality is found in both exponents and amplitudes. We thus term this concentration difference to be the relevant parameter for proper description of the critical behavior and, following Griffiths and Wheeler [Phys. Rev. A 2, 1047 (1970) ], show this relevant parameter was determined by it never having tangential paths of approach to the critical curve.
AB - We present static turbidity and dynamic light-scattering measurements near the critical double point of a mixture of secondary butyl alcohol, tertiary butyl alcohol, and water. At the critical double point of this mixture an upper two-phase miscibility loop merges with a lower two-phase region. When temperature is used as a field variable to describe the critical behavior of the turbidity and correlation length of the mixture, nonuniversal behavior is seen in both the critical exponents and amplitudes. If, however, the tBA concentration difference from the critical curve is used, universality is found in both exponents and amplitudes. We thus term this concentration difference to be the relevant parameter for proper description of the critical behavior and, following Griffiths and Wheeler [Phys. Rev. A 2, 1047 (1970) ], show this relevant parameter was determined by it never having tangential paths of approach to the critical curve.
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M3 - Article
VL - 89
SP - 1608
EP - 1615
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 3
ER -