1. Department of Geology, EPS Linares; University of Jaén; E-23700 Linares Spain
2. Department of Physical and Analytical Chemistry, Campus Las Lagunillas; University of Jaén; E-23071 Jaen Spain
3. Office of Research Transfer and Enterprise, Campus Las Lagunillas; University of Jaén; E-23071 Jaen Spain
4. Conservation Department; Council of the Alhambra and Generalife; E-18009 Granada Spain
5. IRIS; BESSY II Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; D-12489 Berlin Germany