Thermodynamic, surface, and structural properties of HgNa and HgZn liquid alloys

We have studied the mixing behaviour and chemical ordering of Hg-Na and Hg-Zn liquid alloys by computing thermodynamic and microscopic properties at T = 673 K and T = 700 K, respectively in the framework of complex formation model. Surface properties have also been analyzed using two different approaches. The analysis suggests that the ordering energy parameters are temperature dependent and thermodynamic parameters are in good agreement with experimental results. The analysis also shows the presence of Hg2Na complex in Hg-Na liquid alloy with a wide range of solubility than that of a weakly hetero-coordinated HgZn2 complex in Hg-Zn liquid alloy. The values of surface tension obtained from two approaches for Hg-Na alloy have been found to be comparable with each other. The Hg-Zn alloy at 700 K represents a segregating system with the segregation of Zn atoms at surface.