离子极化和离子晶体的晶格能——离子极化能的经验计算和非标准型离子晶体的晶格能

In this paper, the discrepancy between lattice energies theoretically calculated and those experimentally determined for the ionic crystals which contain ions having non-inert gas configuration is discussed with the Fajans‘ concept of ionic polarization.Thus, the actual lattice energy U is expressed as the sum of the purely ionic lattice energy Ui calculated from Kapustinskii equation and the polarization energy Up;U=Ui Up An empirical equation is proposed to calculate ionic polarization energy;Up=α Z^*2/r bα c where Z^*z/r is the polarizing power of the cation,a is the polarizability of the anion,ar b and c are the empirical constants which depend on the type of the compounds concerned.Using above expressions,lattice energies of 317 non-standard type erystalline compounds are caleulated and the results well agree with the experimental values and are better than the ealeulations by other authors.