NON-CLASSICAL EQUATIONS OF STATE FOR CRITICAL AND TRICRITICAL POINTS

We develop a method by which certain classical equations of state may be modified to produce nonclassical critical scaling behavior. We then apply this method to the classical free energy describing a tricritical point that was originally introduced by Griffiths. The phase behavior of the resulting nonclassical free energy is characterized by the competition between critical scaling and tricritical scaling already envisioned by previous authors. © 1979 Plenum Publishing Corporation.