Transformation of schoepite into the uranyl oxide hydrates: Becquerelite, billietite and wölsendorfite
Abstract
The transformation of schoepite into becquerelite, billietite and lead diuranate hydrate by direct reaction of Ca2+, Ba2+ and Pb2+ ions on solid schoepite at 60°C is demonstrated. The phases obtained in the experiments were identified by chemical and powder X-ray diffraction analyses. The solubilities of becquerelite and billietite were determined at 25° C as a function of pH. The distribution of the different uranyl hydroxyl complexes is computed and discussed. From the solubilities and uranyl hydroxyl distributions the Ksp's of becquerelite and billietite are calculated.
- Publication:
-
Mineralogy and Petrology
- Pub Date:
- August 1990
- DOI:
- 10.1007/BF01164222
- Bibcode:
- 1990MinPe..43...65V
- Keywords:
-
- Oxide;
- Hydrate;
- Hydroxyl;
- Oxide Hydrate;
- Geochemistry