Scaling law expressions

In the simplest case the vapour-liquid critical points of the two components may be connected by a continuous locus of vapour-liquid critical points of mixtures at various concentrations with or without additional liquid-liquid immiscibility. In other cases the locus of vapour-liquid critical points is interrupted and starting from one of the components may wonder off to higher temperatures or may crossover to an upper or a lower consolute point. The principle of isomorphic critical behaviour asserts that the thermodynamic behaviour associated with the critical behaviour in mixtures can still be described by the scaling-law expression of eq 10.1 in terms of two independent scaling fields, hi and hj, and a dependent scaling field hi. The different types of critical phenomena observed experimentally are caused by different relationship of these scaling fields with the actual physical fields. ... 

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