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Measurements of temperature dependences of density d and ultrasound velocity Vs of the eutectic Bi-44.6 wt.% Pb alloy were performed from eutectic temperature up to 550–900°C. Density was studied using gamma absorption method. Ultrasound velocity was determined by pulse phase method. The dependences Vs(T) and d(T) are linear in temperature interval of measurements and can be approximated by the equations:These results are found to be in good agreement with data of other works.