Comparison of model calculated (lines) osmotic coefficients (φ) of Mg(NO3)2 Ca(NO3)2, Ba(NO3)2, Sr(NO3)2, UO2(NO3)2, Cr(NO3)3, Al(NO3)3, La(NO3)3, Lu(NO3)3, and Th(NO3)4 in binary solutions 2–1 (Mg(NO3)2-H2O, Ca(NO3)2-H2O, Ba(NO3)2-H2O, Sr(NO3)2-H2O, and UO2(NO3)2-H2O), 3–1 (Cr(NO3)3-H2O, Al(NO3)3-H2O, La(NO3)3-H2O, Lu(NO3)3-H2O), and 4–1 (Th(NO3)4-H2O) against molality at T = 298.15 K, with recommendations in literature (symbols). For Mg(NO3)2-H2O and Ca(NO3)2-H2O systems an enlargement of the low molality corner is also given. Heavy solid lines represent the predictions of the developed in this study and accepted models. Dashed-dotted, dashed and light solid lines represent the predictions of the reference models of Kim and Frederick (1988), of Pitzer and Mayorga (1973), of Rard et al. 2004 (for Mg(NO3)2-H2O), of Wijesinghe and Rard (2005) (for Ca(NO3)2-H2O), and of Rard and Spedding (1981) (for Lu(NO3)3-H2O). On Figures YM denotes YMTDB (Sandia National Laboratories 2007). For Lu(NO3)3-H2O the experimental data and recommended data are taken from Rard et al. (1977) (open squares), and Rard and Spedding (1981) (crosses), respectively. For all other systems the experimental data of Mikulin (1968) are used (open squares and open triangles). The molality of stable and metastable (for Ca(NO3)2-H2O) crystallization of solid nitrate phases (m(sat)) is given on all figures by vertical lines (see Table 1).