摘要
本文选择离子外壳电子数n,有效核电荷数Z~*及半径r三个结构参数,对32种金属离子的资料作主成分分析,第一、二主成分(以Y_1、Y_2表示)对应特征值累计百分率达99.82％,其中λ_i/∑λ=96.90％。以Y_1对Y_2作图,可将这32种金属离子分为五组,其中除Zn^(2+)由第Ⅲ组划入Ⅱ组外,其余均与H_2S系统分组相同。在主成分分析基础上,确定n与Z~*为影响阳离子分组的主要结构参数。用n对Z~*作图分组,结果与以Y_1对Y_2作图相同。本文还讨论了用Z·n值分组的问题。
In this paper, we have made the principal component analysis to 32 metalsions with n, Z~* and r as structural parameters, n for the number of electrons in outer shell, Z~* for the effective nuclear charge and r for the radius. And it turns out that the corresponding eigenvalues of Y_1 and Y_2, the first and the second principal components, reach the accumalative percentage of 99.82％, in which λ_1/Σλ=96.90％. When Y_2 is chartered with Y_1, the 32 metal ions may be classified into 5 groups, which all resemble those of H_2S system but Zn^(2+), put from Group Ⅲ into Group Ⅱ. On basis of the principal component analysis, n and z~* are regarded as principal structural factors that affect the classification of the qualitative system. And when z~* is chartered with n, the result proves to be the same with that of the one in which Y_2 is chartered with Y_1. Also discussed in this paper is the classification with the values ofzz z~*·n.
出处
《四川师范学院学报（自然科学版）》
1989年第4期358-366,共9页
Journal of Sichuan Teachers College(Natural Science)
关键词
定性分析
硫化氢系统
阳离子结构
H_2S system analysis
structural parameters
the pricipal component analysis
