Abstract
The velocity of sound and high-energy -ray attenuation in Ag - Se alloys have been measured as functions of temperature over the whole composition range. The sound velocity in an alloy with a miscibility gap shows an unusual temperature dependence which is characteristic of the critical behaviour associated with the two-melt phase separation. Using these quantities, the molar volume, volume expansion coefficient and adiabatic compressibility have been deduced, which show a distinct cusp at . The results suggest the existence of stable ionic association in the liquid. No indication in the temperature dependences of these thermodynamic functions was found which would correlate with the unusual temperature dependence of the electrical conductivity.
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