Abstract
High energy γ-ray attenuation and sound velocity in Te-rich molten SiTe alloys have been measured. The molar volume deduced from the γ-ray attenuation coefficient shows anomalous contraction with increasing temperature. Correspondingly the thermal expansion coefficient as a function of temperature has a broad negative peak where the adiabatic compressibility evaluated from the sound velocity and the mass density shows a maximum. The unusual behavior of the thermodynamic functions indicates that a rapid structural change occurs in the liquid.
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