1. Géosciences Environnement Toulouse, Université de Toulouse, CNES, CNRS, IRD, UPS, 31400 Toulouse, France
2. † Special collection papers can be found online at http://www.minsocam.org/MSA/AmMin/special-collections.html.
3. Leibniz Universität Hannover, Institute of Mineralogy, 30167 Hannover, Germany
4. Montanuniversität Leoben, 8700 Leoben, Austria
5. Federal Institute for Geosciences and Natural Resources (BGR), 30655 Hannover, Germany