DIELECTRIC POLARIZABILITIES OF IONS IN OXIDES AND FLUORIDES
DIELECTRIC POLARIZABILITIES OF IONS IN OXIDES AND FLUORIDES
复制标题
DOI：
10.1063/1.353856
复制
发表时间：
1993-01-01
影响因子：
3.2
通讯作者：
SHANNON, RD
中科院分区：
文献类型：
--
作者：
SHANNON, RD
一组61离子极化率已来自129氧化物和25氟化物的介电常数，使用最小二乘精化技术结合克劳修斯-Mosotti方程。这些极化率可以用来估计平均介电常数的“良好的”化合物。它们在计算介电常数尚未确定的化合物的平均介电常数时特别有用。它们也可以用作区分不寻常的介电行为与正常介电行为的框架，其中偏差通常归因于压电或铁电性，导电性（离子或电子），具有相应的高或低极化率的“振动”或“压缩”阳离子，或偶极杂质的存在。从计算的介电常数中观察到的偏差可用于搜索不寻常的物理行为。
A set of 61 ion polarizabilities has been derived from the dielectric constants of 129 oxides and 25 fluorides using a least squares refinement technique in conjunction with the Clausius-Mosotti equation. These polarizabilities can be used to estimate mean dielectric constants of ''well-behaved'' compounds. They should be particularly useful in calculation of mean dielectric constants of compounds whose dielectric constants have not been determined. They can also be used as a framework for distinguishing unusual dielectric behavior from normal dielectric behavior where deviations can frequently be attributed to piezo- or ferroelectricity, conductivity (ionic or electronic), ''rattling'' or ''compressed'' cations with correspondingly high or low polarizabilities, or the presence of dipolar impurities. Deviations observed from calculated dielectric constants can be used to search for unusual physical behavior.