1. Department of Physics, Chemical Physics, Chalmers University of Technology, Gothenburg SE-41296, Sweden
2. Stena Center, Atium, Gothenburg SE-41292, Sweden
3. Boliden Kokkola, Kokkola FI-67101, Finland
4. Department of Chemistry and Chemical Engineering, Nuclear Chemistry and Industrial Materials Recycling, Chalmers University of Technology, Gothenburg SE-41296, Sweden