| Autor: |
Yonezawa, Takao, Tomita, Isao |
| Zdroj: |
Journal of Inorganic and Nuclear Chemistry; January 1977, Vol. 39 Issue: 9 p1671-1673, 3p |
| Abstrakt: |
Forward and reverse exchange of hydrogen-alkali metal ions (Li+, Na+and K+) was investigated on crystalline zirconium arsenate prepared by refluxing the gel in a mixture of HNO3and H3AsO4. Each of forward titration curves had two distinct regions and selectivity sequences were K+> Na+> Li+for the first stage and Na+≈ Li+> K+for the second stage of exchange. X-ray powder patterns suggested the presence of a half exchanged phase and a fully exchanged phase. In the backward titration, the curves did not show any remarkable pH jump at half exchange. IR spectra of α-ZA and partly metal-ion exchanged phases suggested the presence of two OH groups with different acidity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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