1. Department of Mineralogy and Petrology, University of Granada, Av/Fuentenueva s/n, 18071 Granada, Spain
2. Centre de Recherche et de Restauration des Musées de France (CNRS-C2RMF), 14 quai François Mitterrand, Palais du Louvre, 75001 Paris, France, Materials Science Institute of Seville (CSIC-UNSE), Americo Vespucio 49, 41092 Seville, Spain
3. Micro and Trace Analysis Centre, Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium