Abstract
Terlet and Briau1 have found that variable amounts of the ammonium ions in an ammonium phosphomolybdate precipitate may be displaced by potassium ions, and to a lesser extent by sodium ions, when the precipitate is washed with neutral potassium nitrate or sodium sulphate solutions. These observations have been confirmed by Gisiger2 and by Thistle-thwaite3, who have found that approximately two of the three ammonium ions are exchanged for potassium.
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References
Terlet, H., and Briau, A., Ann. Falsific., 28, 546 (1935).
Gisiger, L., Z. anal. Chem., 115, 15 (1938).
Thistlethwaite, W. P., Analyst, 72, 531 (1947).
Wells, A. F., “Structural Inorganic Chemistry”, p. 351, 2nd edit. (Clarendon Press, Oxford, 1950).
Kayas, G., J. Chim. Phys., 47, 408 (1950).
Buchwald, H., and Thistlethwaite, W. P., J. Inorg. Nucl. Chem., 5, 341 (1958).
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SMIT, J. Ammonium Salts of the Heteropolyacids as Cation Exchangers. Nature 181, 1530–1531 (1958). https://doi.org/10.1038/1811530a0
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DOI: https://doi.org/10.1038/1811530a0
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