提出了一个新的原子参数 Hi 和分子结构参数H .H和 84种稀土化合物的标准生成焓有良好的线性相关性 ,运用最小二乘法建立回归方程 -ΔfHθm =1 5 5 .83 +1 0 4 1 .6 6H ,相关系数为 0 .979,在α =0 .0 1下通过F检验 .结果表明 ,H能够用于预测化合物的性质 A new linear parameter Hi and the molecular structure parameter HH and the standard enthalpies of formation of 84 kinds of rare earth compounds were found to have a good linear correlation. The least square method was used to establish the regression equation -ΔfHθm = 1 5 5 .83 +1 0 4 1.6 6H, with a correlation coefficient of 0.979, passing the F test at α = 0. 01. The results show that H can be used to predict the nature of the compound