Dielectric and ultrasonic studies of benzene-hexafluorobenzene mixtures

Abstract

Dielectric and ultrasonic measurements on binary mixtures of benzene with hexafluorobenzene are reported. The dielectric measurements cover the submillimetre and microwave spectral regions and the ultrasonic absorption experiments were performed at 1.5 MHz. Excess functions computed from these data are found to exhibit a maximum towards the benzene-rich mixtures. The significance of these observations is discussed in terms of the existence of small concentrations of weakly interacting species in these mixtures.