摘要
统计分析了３００多种结构类型的金属间化物中原子的配位数规律，发现各种原子具有不同的配位数选择倾向性，分析了典型的原子配位环境，导致上述原子配位环境选择性的原困，找出其与原子内在性质如原子尺寸和电负性等的关系，总结出规律并利用这些规律帮助理解金属间化物的形成和结构特性．
Ternary and quaternary compounds in the rare earth (or alkaline earth)transition metal - main group element systems often have quite complicated stoichiometries and a great variety of crystal structure types. In this work, the correlations between the preferred coordination numbers (CNs) and atom size (R) and electronegativity values (EN) of the elements were investigated. Atomsize and electronegatlvity are very important factors among those that affect and govern the coordination features and the crystal structures. The advantages of choosing R/EN ratio as a new scale when plotting CNs are clearly shown by a nearly monotonic Increase ofCNs when increasing R/EN, and by the fact that the atoms with similar R/EN values have simi. far coordination features. The graphs may be used as a guideline for synthesizing new orderedmultinary intermetallic compounds' in elucidating possible order-disorder and problematic structures and rationalizing crystallographic bite preference.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1996年第4期533-537,共5页
Journal of Xiamen University：Natural Science
基金
瑞士国家自然科学基金
中国国家自然科学青年基金
关键词
配位环境
原子尺寸
电负性
金属间化合物
Intermetallic compounds, Coordination environment, Atoms size, Electronegativity
