Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Critical Region



Jan V. Sengers, M A. Anisimov


The chapter reviews the current state of the art of describing the thermodynamic behavior of fluids and fluid mixtures. It elucidates the difference between Ising-like asymptotic critical thermodynamic behavior and mean-field critical thermodynamic behavior as well as the crossover behavior between these two regimes. It discusses the principle of universality of critical behavior and shows how the description can be extended to fluid mixtures on the basis of an isomorphism principle. A number of representative applications are presented.
International Union of Pure and Applied Chemistry


critical behavior, fluid mixtures, Ising-like, thermodynamic, thermodynamic behavior


Sengers, J. and Anisimov, M. (2008), Critical Region, International Union of Pure and Applied Chemistry (Accessed June 23, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 16, 2008