在前文中,作者曾用两种方法来計算Bi中間化合物的标准生成自由能。第一种方法是利用Bi-X二元系中的活度数据結合相图来計算,第二种方法是以Bi-X-Y或Bi-X-Y-Z系中的相平衡关系和相应的活度数据作为計算的基础。本文报告用这两种方法計算三个Mg中間化合物的标准生成自由能的結果。Mg-Si系中的活度尚无人予以测定,因此要計算Mg_2Si的标准生成自由能只能用上述 In the previous article, the authors used two methods to calculate the standard free energy of formation of Bi intermediate compounds. The first method uses the activity data in the Bi-X binary system in combination with the phase diagram. The second method uses the phase equilibrium in the Bi-XY or Bi-XYZ system and the corresponding activity data as the calculation Foundation. This paper reports the results of the two methods for calculating the standard free energy of formation of the three Mg intermediate compounds. Mg-Si activity in the system has not been determined, so to calculate the standard Mg2Si generation of free energy can only use the above