Behaviour of cesium and lithium during the precipitation of jarosite-type compounds |
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| Affiliation: | 1. South African Nuclear Energy Corporation SOC Ltd (Necsa), Elias Motsoaledi Street, R104 Pelindaba, P.O. Box 582, Pretoria 0001, South Africa;2. Chemical Resource Beneficiation, North-West University, Potchefstroom campus, Private Bag X6001, Potchefstroom 2531, South Africa;3. Centre for Applied Radiation Science and Technology, North-West University, Mafikeng campus, Private Bag X2046, Mmabatho 2735, South Africa;1. Institut de Minéralogie, Physique des Matériaux et Cosmochimie (IMPMC). Muséum National d''Histoire Naturelle, Université Pierre et Marie Curie, Sorbonne Universités, Centre National de la Recherche Scientifique UMR 7590, IRD 206. 4 place Jussieu, 75 005 Paris, France;2. Institute of Ecology, Friedrich Schiller University Jena, Jena, Germany;3. The German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany;1. Institute of Volcanology and Seismology, FEB RAS, Petropavlovsk-Kamchatsky 683006, Russia;2. Institute of Geophysics, Universidad Nacional Autónoma de México, México City 04510, Mexico;3. IstitutoNazionale di Geofisica e Vulcanologia, Palermo, Italy. |
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| Abstract: | End-member cesium jarosite CsFe3(SO4)2(OH)6] and end-member lithium jarosite LiFe3(SO4)2(OH)6] do not exist. Cesium-bearing potassium, sodium and rubidium jarosites were synthesized, however, with cesium contents > 2 wt% being noted in potassium jarosite. The cesium content of the jarosites increases with increasing cesium concentration in solution, and the order of cesiumincorporation is potassium jarosite > sodium jarosite > rubidium jarosite. Only trace amounts of lithium are incorporated in jarosite; the maximum obtained was ～ 0.2 wt% lithium in potassium jarosite. The lithium content increases with increasing lithium concentration in the synthesis solution, but is nearly independent of the potassium concentration or the solution pH. Although some of the lithium may be structurally incorporated in the jarosite, most seems to be physically entrained. |
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