The vibrational spectra of SO2−4 ion in the hydrated double sulphates: The tutton salts
Review articleOpen access
1984/01/01 Full-length article DOI: 10.1016/0022-2860(84)80241-0
Journal: Journal of Molecular Structure
AbstractThe infrared spectra of ten double sulphates, viz., M′2M″(SO4)2 6H2O (M′ NH4/K; M″ Ni, Co, Fe, Cu, Zn and Mn) have been recorded in the 1300–400 cm−1 region and the vibrational spectra of SO2−4 ion in these salts compared. Spectroscopic observations are correlated with the known SO bond lengths in these salts. The spectrum of the KCu salt is distinct from that of the others and the existence of two types of SO2−4 ions in this salt is suggested. In all the salts, the SO2−4 ion exhibits linear as well as angular distortion from its free-state tetrahedral symmetry. The linear distortion is, however, greatest in the Mn salt, consistent with known crystal structure data.
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