Sound Wave Propagation in Molten Silver Halides

Abstract

The velocity of sound wave propagation and attenuation have been measured in molten AgX (X=Cl, Br and I) at temperatures beginning from the respective melting points to about 850°C. The observed sound velocities decrease almost linearly with increasing temperature, and sound attenuation in molten AgI is larger than that in molten AgBr and AgCl. The adiabatic compressibility is derived from the sound velocity; in these molten salts, the adiabatic compressibilities are discussed from the viewpoint of the mixed characteristics of covalent and ionic one. The isothermal compressibility of liquid AgI was calculated by using the three partial distribution functions which were already calculated by the hypernetted chain approximation using the pair potentials. The calculated result is comparable to the experimental one.