TEXT Sebastian Schmidt1, 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
