Abstract
An attempt has been made to assign empirical formulae and possible ion exchange site for the antimonates of Zr(IV), Sn(IV) and Cr(III). On the basis of analytical data, exchange capacity, infra-red and thermoanalytical investigations these ion exchangers have the compositions as: ZrO2·0.5 Sb2O5·5.1 H2O, SnO2·2.5 Sb2O5·15 H2O and Cr2O3·5Sb2O5·31 H2O. Water molecules shown is the total water present which includes both water of constitution and water of crystallization. The H+ attached to anionic part of the exchanger, i.e., Sb−OH is the possible site for cation exchange. However, the general shape of curves in McKay Plot and the dependence of Kd values on the concentration of metal ions in solution at constant pH suggest more than single possible exchange site.
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Mathew, J., Tandon, S.N. & Gill, J.S. Structural studies on some antimonate exchangers. J. Radioanal. Chem. 49, 55–62 (1979). https://doi.org/10.1007/BF02520957
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DOI: https://doi.org/10.1007/BF02520957