Characterisation of a uranium ore using multiple X-ray diffraction based methods |
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| Authors: | Hailey S. Reynolds Rahul Ram Fiona A. Charalambous Frank Antolasic James Tardio Suresh Bhargava |
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| Affiliation: | 1. School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China;2. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China;1. Department of Animal Sciences, Veterinary School, Universidad de Federal de Minas Gerais Avenida Antonio Carlos, 6627 Campus UFMG, Belo Horizonte, Brazil;2. Spanish Council for Scientific Research (CSIC), Institute of Environmental Assessment and Water Research, C/ Jordi Girona 18-26, 08034 Barcelona, Spain;3. Universidad de Antioquia, Departamento de Ingeniería Química, Facultad de Ingeniería, Grupo Catálisis Ambiental, Calle 70 No. 52-2, Medellín, Colombia;1. Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7590, IRD UMR 206, 4 Place Jussieu, F-75005 Paris, France;2. AREVA Mines, R&D Dpt., Paris, La Défense, France. |
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| Abstract: | Uranium bearing ores are often a complex mixture of minerals and compounds, a number of which are not of economic importance and are commonly referred to as gangue materials. In order to improve the efficiency of the dissolution stage of the overall uranium extraction process, a greater understanding of the minerals and compounds present in the ore is required. A greater knowledge of the gangue materials present is important as they can influence various aspects of the dissolution process such as providing potential adsorption sites for aqueous uranium species and through influencing the equilibrium of reactions involving aqueous uranium species. In this study the mineralogy of a uranium ore was investigated using a range of X-ray diffraction (XRD) based methods including in situ high temperature XRD and XRD using a synchrotron beam line. The results obtained from standard XRD (Cu Kα), high temperature XRD and synchrotron XRD (16.534 keV) were compared and a number of minerals were identified. The improved spatial resolution and intensity of the synchrotron data allowed for superior phase identification of a variety of minerals where standard X-ray techniques gave inconclusive results. |
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