Inorganic compounds polarizability

Evidently, the smaller the atom the stronger its polarizing effect. If the smaller ion is the cation (as is usually the case) then it reduces the total a of the substance, if the anion then a increases. Such simple approach allows calculating polarizability of inorganic compounds with good accuracy [11]. 

In inorganic crystals atoms have higher and, as follows from Table 11.3 and the polarizabilities of clusters (Table 11.6), their refractions must be lower than in the molecular state. Because the Lorentz-Lorenz function approaches 1 when n oo, and metals have very high RIs (at X = 10 (.im, Cu has n = 29.7, Ag 9.9, Au 8.2, Hg 14.0, V 12.8, Nb 16.0, Cr 21.2, etc [147]), we assumed that R = V foi solid metals [148], These refractions of metals, Rm (Table 11.5, lower lines) in some cases are close to the additive values [13,14]. Rm cannot be applied directly to calculate molar refractions of crystalline inorganic compounds because of the differences in Nc, but can be used [149] to calculate refractions of metals for such Nc as they have in the structures of their compounds, using the formula... 

The theoretical problems associated with calculating nonlinear polarizabilities is closely linked to the field of charge transfer spectroscopy and reactivity as well as the field of multi-photon and excited state spectroscopy. It is likely that theoretical methods from these fields will contribute to a deeper understanding of nonlinear optical phenomena in organic, inorganic, and organometallic compounds. 

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