A new description regarding the approach to double criticality in quasi-binary liquid mixtures

Narayanan, T. ; Kumar, A. ; Gopal, E. S. R. (1991) A new description regarding the approach to double criticality in quasi-binary liquid mixtures Physics Letters A, 155 (4-5). pp. 276-280. ISSN 0375-9601

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0375-9601(91)90482-N

Abstract

Electrical resistance and phase diagram measurements are reported for reentrant liquid mixtures 3-methylpyridine + water + NaCl and 3-methylpyridine + water + heavy water respectively. The results are analyzed employing a new field variable - which allows for the description of the access to any point on the critical line - by the same universal exponent. This method is also in agreement with the doubling of the critical exponents near the double critical point, using the conventional field variable z.sfnc;(Tc - T)/Tcz.sfnc;.

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