1. Faculty of the Sciences, Chemistry Department, The Inorganic Chemistry Unit, University of Lubumbashi, Lubumbashi, The Democratic Republic of Congo
2. Applied Chemistry and Metallurgy Section, Chemistry Unit, Higher School of Applied Techniques in Lubumbashi (ISTA-LU), Lubumbashi, The Democratic Republic of Congo
3. Department of Earth and Environmental Sciences, Ore Geology and Geofluid Research Group, Faculty of Sciences, KU Leuven, Leuven, Belgium
4. Faculty of Sciences, Department of Geology, University of Lubumbashi, Lubumbashi, The Democratic Republic of Congo