摘要
建立材料的折射率和某些原子参数之间的定性关系并以一些氧化物晶体的折射率实验数据作了验证。文中定义了参数P=r- (r+ΔxD),式中Δx是材料中半径为r+的阳离子和半径为r-的阴离子之间的电负性差,D是本文引进的描述离子质量差异效应的因子。文中从理论上同时也从具体实验数据的讨论上证明了材料的折射率是参数P的减函数。这个关系对光学材料的研究有帮助。
The refractive index is one of the important parameters describing the optical properties of solid materials. However, it is difficult to obtain a quantitative relation between the refractive index and the structure and composition of materials. A qualitative relation between the refractive index and some atomic parameters of materials was proposed and demonstrated by some oxide optical crystals. A parameter P=r-/(r+ΔxD) is defined, where Δx is the difference of the electronegativities between cations and anions in the materials and r+ and r- are the radius of cations and anions respectively. On the other hand, the factor D is introduced to describe the effect of mass difference of the ions. It is demonstrated by both theoretical discussion and experimental data that refractive index is a decreasing function of parameter P. The relation may be useful for the investigations of optical materials.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2002年第6期677-679,共3页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(60088004)
福建省重大科技计划(2002H004)
中国科学院资助项目
