Liquid–Liquid Coexistence Curve of n -Perfluorohexane– n -Hexane System

The shape of the liquid–liquid phase boundary of theC6F14–C6H14 system near the critical solution point has been determined by a γ -ray attenuation technique. According to the measurements, the critical solution temperature and composition are 295.69±0.02K and 36.1±0.3mol% C6F14, respectively. The critical exponent of the liquid–liquid coexistence curve is 0.322±0.008. Midpoints of the coexistence curve exhibit a departure from the law of the rectilinear diameter.