1. Institute of Physics of the CAS, v.v.i., Na Slovance 2, CZ-182 21 Praha 8, Czech Republic
2. Institute of Geosciences, Friedrich-Schiller-Universität, Burgweg 11, 07749 Jena, Germany
3. Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic
4. Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
5. Institute of Mineralogy, Crystallography and Materials Science, University Leipzig, Scharnhorststraße 20, 04275 Leipzig, Germany
6. Central Laboratories, University of Chemistry and Technology, Technická 5, 166 28 Praha 6, Czech Republic