Acoustic properties of some liquid Tl-Te alloys

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Abstract
Measurements of the velocity of sound in three Tl-Te alloys (30, 50 and 66.67 at.% Tl respectively) suggest that the loose three-fold coordination in pure liquid Te at temperatures below 700 degrees C gives place to a typically metallic coordination on the addition of only a small amount of Tl. Some measurements of acoustic attenuation as a function of frequency for the 50 and 66.67 at.% alloys show no clear signs of structural relaxation and give ratios of bulk to shear viscosity typical of those found in covalently bonded liquids, in contrast with the high values usually found in ionic liquids.
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