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An evaluation of Mossbauer isomer shift and quadrupole splitting data of Fe 2+ in a number of structurally well characterized neso- and sorosilicates is presented. It is found that the nearly linear correlations exist both between the isomer shift and the bond length and between the isomer shift and the bond strength. These correlations are discussed on the basis of the variation of the s-electron density at the Fe 2+ nuclei with the chemical bond characteristics.