1. Institute
of Applied Geosciences, Graz University of Technology, Rechbauerstrasse
12, A-8010 Graz, Austria
2. Competence Center Mineralogy & Beneficiation, Omya GmbH Gersheim Strasse 1-2, 9722 Gummern, Austria
3. Sales & Marketing/Research and Development, Omya International AG, Baslerstrasse 42, 4665 Oftringen, Aargau, Switzerland