1. Department of Mineralogy, Institute for Geosciences, Friedrich Schiller University Jena, Carl‐Zeiss‐Promenade 10, Jena, Germany, http://www.mingeoch.uni‐jena.de/Personen/Maria+Wierzbicka_Wieczorek.html
2. Institute of Mineralogy and Crystallography, University of Vienna, Geocentre, Althanstr. 14, 1090 Vienna, Austria
3. Department of Mineralogy and Petrography, Natural History Museum, Burgring 7, 1010 Vienna, Austria