Home – Home – Jornals – Thermophysics and Aeromechanics 2026 number 4

The density of liquid rubidium-lead alloys containing 40, 45, 55, and 60 at. % Pb was measured for the first time using the gamma-ray attenuation method (transmission of a narrow gamma-ray beam through the sample) in the temperature range from the liquidus to ~1000 K. Based on the obtained results and data for the Rb₅₀Pb₅₀ melt previously investigated by the authors, the concentration dependencies of the molar volume, relative excess molar volume, and volumetric thermal expansion coefficient were determined for the liquid Rb-Pb system. These dependencies deviate significantly from those characteristic of ideal solutions, confirming a tendency toward the formation of chemical short-range order in the liquid state.