Mechanisms of ion exchange in crystalline zirconium phosphates. XI. Variation in unit cell dimensions and sodium ion/hydrogen ion exchange behavior in highly crystalline .alpha.-zirconium phosphates
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The Na+/H+ exchange behavior of highly crystalline samples of α-zirconium phosphate were examined. It was found that the greater the degree of crystallinity, as measured by the time of digestion of α-ZrP in 12 M H3PO4, the greater was the preference of the exchanger for sodium ion relative to hydrogen ion. However, under all conditions examined, hydrogen ion was greatly preferred. Precise determination of the unit cell dimensions of the several exchangers showed a systematic variation in their values. This variation is attributed to structure differences arising from the digestion process. A qualitative explanation of the observed ion-exchange behavior of α-ZrP is presented based on the proposed variations in structure of the exchanger samples.
author list (cited authors)
Clearfield, A., Kullberg, L., & Oskarsson, A.