The mixing enthalpies of Sr–Sb melts were measured by isoperibolic calorimetry at 1230 K over the entire composition range referred to the liquid components. Large exothermic mixing effects were found (∆H min = –70.1 ± 4.8 kJ/mole). They were indicative of very strong interaction between the components and agreed with the Sr–Sb phase diagram. A series of intermetallic compounds, SrSb, SrSb 3 , Sr 3 Sb 2 , and Sr 2 Sb, was found in the system. Minimum ∆H for the liquid alloys corresponds to the composition range where SrSb and Sr 3 Sb 2 phases exist. The mixing enthalpies were found to be less exothermic than those for the intermetallic phases. This finding agrees with data for the alloys in systems with strong interaction between the components and is indicative of short-range ordering in liquid state. The mixing enthalpies for Mg (Ca, Sr)–Sb melts decrease in the Mg–Sb → Ca–Sb → Sr–Sb series, which agrees with increasing differences in the electronegativity of the components.

中文翻译：

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Sr-Sb 熔体的混合焓

Sr-Sb 熔体的混合焓是通过等周量热法在 1230 K 下在整个组成范围内测量的，参考液体组分。发现了大的放热混合效应（ΔH min = –70.1 ± 4.8 kJ/mole）。它们表明组分之间的相互作用非常强，并且与 Sr-Sb 相图一致。在该体系中发现了一系列金属间化合物SrSb、SrSb 3 、Sr 3 Sb 2 和Sr 2 Sb。液态合金的最小 ∆H 对应于 SrSb 和 Sr 3 Sb 2 相存在的成分范围。发现混合焓比金属间相的放热少。这一发现与组件之间具有强相互作用的系统中合金的数据一致，并表明液态下的短程有序。Mg (Ca,