1. Department of Chemistry and Pharmacy Inorganic Chemistry Friedrich‐Alexander University Erlangen‐Nürnberg (FAU) Egerlandstrasse 1 D91058 Erlangen Germany
2. Fraunhofer‐Institute for Silicate Research ISC Neunerplatz 2 D97082 Würzburg Germany
3. Chair of Chemical Technology of Materials Synthesis Julius‐Maximilians‐University Würzburg Röntgenring 11 D97070 Würzburg Germany