Standard enthalpies of formation of some Th alloys with Group VIII elements (Co, Ni, Ru, Rh, Pd, Ir and Pt), determined by high-temperature direct synthesis calorimetry
作者:Junwen Wang、Qiti Guo、O.J Kleppa
DOI:10.1016/s0925-8388(00)01157-9
日期:2000.12
Abstract The standard enthalpies of formation of seven alloys formed between Th, an element from Group III, and Co, Ni, Ru, Rh, Pd, Ir and Pt, elements from Group VIII, have been determined by high-temperature direct synthesis calorimetry at 1473±2 K. The following values of Δ H f o , in kJ (mol atom) −1 , are reported: ThCo 5 , −17.0±2.3; ThNi 5 , −34.8±1.9; ThRu 2 , −28.9±1.6; ThRh 3 , −60.3±2.8;
摘要 通过高温直接合成量热法测定了第 III 族元素 Th 与第 VIII 族元素 Co、Ni、Ru、Rh、Pd、Ir 和 Pt 之间形成的七种合金的标准生成焓。 1473±2 K。报告了以下Δ H fo 值,单位为kJ(摩尔原子) -1 : ThCo 5 ,-17.0±2.3;ThNi 5 ,-34.8±1.9;ThRu 2 , -28.9±1.6; ThRh 3 ,-60.3±2.8;ThPd 3 ,-86.1±3.2;ThIr 2 ,-78.0±3.4;和 ThPt 3 ,-89.7±5.1。将结果与来自 Miedema 模型的预测值以及关于 ThCo 5 、ThNi 5 、ThRu 2 和 ThRh 3 的吉布斯形成自由能的可用文献数据进行比较。还将结果与 ThRh 3 的早期量热值 Δ H fo 进行比较(Kubaschewski 等人,Materials Thermochemi