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Structure of Bi 100−x Ga x molten alloys containing 38•5, 50, 70 and 91•5 at. % Ga has been studied by means of X-ray diffraction method and compared with viscosity measurements data. Significant changes in the structure factor profile were observed in vicinity of the concentration 70 at. % Ga. The dynamic viscosity coefficient was calculated by use of a statistical atomic distribution model and a Born-Green kinetic theory. The concentration dependence of viscosity is in agreement with change of structure parameters obtained from diffraction data.

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X-ray diffraction method has been carried out to study the structure in the equiatomic InPbGaSnCu high entropy alloy in liquid state. Structure factors and pair correlation functions have been analyzed and used to determine the main structure parameters. Existence of shoulder on right hand side of principal peak and its transformation was the main feature of structure factors. Comparison of structure functions and main parameters obtained from them for multicomponent alloy with ones for constituent elements shown that mixing process is related with formation of structural inhomogeneities in liquid state.

Short range order structure of liquid Ni66,7In33,3 alloy has been studied by means of X-ray diffraction method at temperatures 1235; 1260 and 1335 K. Experimental structure factors and radial atomic distribution function are analyzed. It is shown that structure of Ni66,7In33,3 in liquid state reveals chemical ordering, like to Ni2In type structure