Effect of temperature on the structure of liquid In20Sn80

X-ray diffraction, density and dynamic viscosity measurements on liquid In20Sn80 have been carried out between 300 and 800 °C. An effect of temperature on the atomic structure of molten In20Sn80 is discussed in terms of the model of inhomogeneous structure. It is shown that the structure of liquid In20Sn80 can be presented by atomic clusters with stable composition and atomic packing and a portion of free atoms with higher mobility. The number and the size of clusters decrease and the volume fraction of free atoms increases under heating.