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Potassium-ion Exchange on α-Hafnium Phosphate

1984; Oxford University Press; Volume: 57; Issue: 11 Linguagem: Inglês

10.1246/bcsj.57.3281

1348-0634

Isao Tomita, Masaru Banju, Katsumi Noguchi, Toshihiro Nakamura,

Radioactive element chemistry and processing

Forward and backward pH titration curves were measured for potassium-ion exchange on crystalline α-hafnium phosphate which had been prepared by the direct-precipitation method. Exchange in each direction proceeded in two steps, and the hysteresis was observed in the region of smaller loadings of the potassium ions. Exchange in the ternary H+–Li+–K+ system was also preliminarily investigated, the selectivity of the potassium and lithium ions was what would be expected from the results of the binary hydrogen ion-alkali metal ion systems.