1. Chair of Solid-State and Quantum Chemistry, Institute of Inorganic Chemistry, RWTH Aachen University, D-52056 Aachen, Germany
2. Research Neutron Source Heinz Maier-Leibnitz (FRM II), Technical University Munich, D-85748 Garching, Germany
3. Institute IME Process Metallurgy and Metal Recycling, RWTH Aachen University, 52056 Aachen, Germany