New empirical relation for chemical shift and effective charge in the X-ray absorption edge shifts.

A new relation, ΔE = ae, between the chemical shift ΔE and effective charge 'q' is proposed. It has been shown that the relation generates polynomial relations, between ΔE and 'q' used by earlier investigators and addresses their short-comings effectively. Further, four possible sign combinations of 'q' and ΔE are accounted for using the proposed equation.