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Fig. 5 Fractionation indices for sulfides from this study and ref. 13 and 35 as a function of their 50% condensation temperatures (based on the Ivuna carbonaceous chondritic composition at 10−4 bar (ref. 34)). Dashed line represents a linear fit to the calculated fractionation indices using Fi values from this study only. Previously derived Fi values for Fe-rich metal alloys from Steenstra et al. (ref. 26) and the corresponding relationship of Fi with volatility are plotted for comparison purposes.图5 本研究与参考文献13、35中的硫化物分馏指数随其50%凝聚温度的变化关系（基于10^-4巴下的伊夫纳碳质球粒陨石成分，参考文献34）。虚线代表仅采用本研究的Fi值对计算所得分馏指数进行的线性拟合。为便于对比，同时绘制了斯特恩斯特拉等人（Steenstra et al.，参考文献26）此前推导的富铁金属合金Fi值，以及Fi值与挥发性之间的对应关系。