Synthesis,solubility, electrokinetic properties and refined crystallographic data of sabugalite |
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| Authors: | R Vochten J Pelsmaekers |
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| Institution: | 1. Laboratorium voor chemische en fysische Mineralogie, Universiteit Antwerpen, Middelheimlaan 1, 2020, Antwerpen, Belgium
2. Studiecentrum voor Kernenergie, Boeretang 200, 2400, Mol, Belgium
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| Abstract: | Sabugalite has been synthesized directly from pure chemicals. From chemical, differential thermal and thermogravimetric analyses, its formula is calculated as HA1(UO2/PO4)2·16H2O. The natural relationship between hydrogen autunite, autunite and sabugalite was investigated by means of ion exchange experiments, and its infrared spectrum, electrokinetic properties and solubility studied. An increase in solubility results in a more positive zeta-potential. The cell dimensions have been determined from Guinier-Hägg diffraction data. Synthetic sabugalite crystallizes in the monoclinic system with space group C2/m and cell parameters: a=19.426 Å; b=9.843 Å; c=9.850 Å; α=γ=90°; β=96.161°; V=1,872.54 Å3 and Z=2. |
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