The Structure Model of an Inorganic Ion Exchanger Cobalt(II)-hexacyanoferrate(II)
Open Access
- 1 December 1978
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 33 (12) , 1484-1488
- https://doi.org/10.1515/znb-1978-1224
Abstract
Cobalt(II)-hexacyanoferrates(II) with incorporated monovalent Na+, K+ , NH4 + and Cs+ ions have been synthetized. Chemical composition and structure of the unit cell of the crystallites have been determined by X-ray and IR analysis. It has been found that all crystallites containing the monovalent cations are isomorphous having an FCC structure, whereas the cobalt(II)-hexacyanoferrate(II) crystallites tetragonally. In order to explain the properties of these crystallites (which are similar to zeolites) causing their selectivity to monovalent cations, a structure model has been proposed. The values of effective radii of the "cages" and their entrances have been calculated.Keywords
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