TEXT Sebastian Schmidt
1, Prof. Dr. Dr. Herbert Pöllmann2, Prof. Dr. Wolfgang Krcmar1 1University of Applied Sciences Nuremberg Georg Simon Ohm, Materials TechnNuremberg/Germany
2Institute of Geosciences and Geography, Mineralogy/Geochemistry Section, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale)/Germany
