On Electronegativities of the Rare-Earth Elements Based on Relative Valence Electron Binding Energies

The electronegativities of the rare-earth elements are
proposed;
these use average “relative valence electron binding energies”
(ReVEBE) that are deduced from experimental spectroscopic data listed
in the NIST Atomic Spectra Database. According to this concept, only
the lowest-lying levels of the valence electron configurations are
considered. These electronegativities were obtained as estimated binding
energies based on a modified concept by Rahm, Zeng, and Hoffmann of
ground-state average valence electron binding energies for the main
group and transition metal elements. The modification presented here
enables determination of the electronegativities of the rare-earth
elements. The obtained values are in very good agreement with those
proposed by Allen, Pauling, and Mulliken, as well as the optical electronegativities
of the lanthanoid elements. This is remarkable since these concepts
relate to different physical principles.

本文提出了稀土元素的电负性数值；该标度采用平均相对价电子结合能（relative valence electron binding energies, ReVEBE），其推导自美国国家标准与技术研究院（National Institute of Standards and Technology, NIST）原子光谱数据库收录的实验光谱数据。根据该概念，仅考虑价电子组态的最低能级。此类电负性数值基于拉姆（Rahm）、曾（Zeng）与霍夫曼（Hoffmann）提出的主族及过渡金属元素基态平均价电子结合能修正概念，以估算结合能的形式得到。本文提出的修正方法可实现稀土元素电负性的计算。所得数值与艾伦（Allen）、鲍林（Pauling）、马利肯（Mulliken）提出的电负性标度，以及镧系元素的光致电负性均具有极佳的一致性。鉴于这些概念基于不同的物理原理，这一一致性结果尤为引人注目。