“…The activity coefficients of some actinides (U, Th, Np, Pu, Am) and fission products (Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, and Er) were recently summarized by Zhang et al and the relationship between solubility and activity coefficient of a metal in liquid Bi is also given in the reference. The correlations between solubility and temperature for elements Be, Mg, Ca, Sr, Ba, Al, Si, Ce, Lu, Th, Ti, Zr, Hf, V, Cb, Ta, Cr, Mo, W, Mn, Fe, Ru, Os, Co, Rh, Ni, Pd, and Pt were summarized in previous studies . When the solubility is low, the solution can be an infinite dilution, and the activity coefficient is non‐concentration dependent and it can be calculated using the correlation between solubility and activity coefficient that is given by Zhang et al Recently, the concentration‐dependent activity coefficients of Dy, Gd, Ho, La, Lu, Nd, Tb, and Tm were calculated based on CALPHAD .…”