1. Ruhr-Universität Bochum, Inorganic Chemistry III-Materials
Engineering and Characterization, D-44780 Bochum, Germany
2. Deutsches Elektronen Synchroton DESY, D-22607 Hamburg, Germany
3. Ruhr-Universität Bochum, Laboratory of Industrial Chemistry, D-44780 Bochum, Germany
4. Materials
Science and Engineering, Iowa State University and Critical Materials Institute, Ames Laboratory, Ames, Iowa 50011, United States