1. Section for Solid State and Theoretical Inorganic Chemistry, Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany, http://www.mnf.uni‐tuebingen.de/fachbereiche/chemie/institute/anorganische‐chemie/institut/ag‐meyer/startseite.html
2. Department of Chemical Engineering, Münster University of Applied Sciences, Stegerwaldstraße 39, 48565 Steinfurt, Germany
3. Mineralogisch‐Petrographisches Institut, University of Hamburg, Grindelallee 48, 20146 Hamburg, Germany