氧化物晶体折射率与原子参数间的定性关系  

Qualitative Analysis of Relationship between Refractive Index and Atomic Parameters of Solid Materials

作　　者：罗遵度[1] 黄艺东[1] 

机构地区：[1]中国科学院福建物质结构研究所,福建福州350002

出　　处：《中国稀土学报》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

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 Δx 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.

关 键 词：氧化物晶体 折射率 原子参数 定性关系 离子半径 离子质量 电负性 光学性质 

分 类 号：O734.2[理学—晶体学]