晶体中离子的极化和离子半径

Polarizabilities and Radii of lons in crystals

本文在极化的键模型理论的基础上,提出了依据晶体中离子半径分配晶体中单键极化率到各离子,进而得到晶体中离子极化率的方案。并在低频近似的情况下,计算了 CaF_2、SrF_2、BaF_2晶体中各离子的极化情况。还计算了有关离子的离子半径。并用极化的相互作用模型对计算得到的离子极化率进行了验证,对结果进行了讨论。

In this paper,a new method to calculate the polarizability ofions in crystals was proposed based on the bond model.The polarization on theion was obtained in approximation of low frequency by means of appointingthe bond polarization on the bond based on the ionic radius and then summingit.According to this method,the polarizabilities of CaF_2,SrF_2 and BaF_2 crys-tals were calculated.The ionic radii of the ions in the crystals were also cal-culated.The polarizations obtained on the ions were proven according to theinteraction model for the polarizability,and the results was discussed.