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本文从热力学原理出发,推导出:二元系中化合物的标准生成自由能符合拟抛物线规则;推广到三元系中则应符合抛物面规则;并且利用上述规则判定含稀土体系中化合物的稳定性。
Based on the principle of thermodynamics, this paper deduces that the standard free energy of formation of compounds in the binary system conforms to the pseudo-parabola rule, that the parabola rule is extended to the ternary system, and the stability of the compounds in rare earth-containing systems is judged by the above rules.