This research was carried out within a Marie Curie initial training network from the European Commission (MINSC ITN 290040). The Deutsche Forschungsgemeinschaft (DFG) supports the research at the University of Münster. CRA and DG thank the SFB1214 and the Zukunftskolleg of the University of Konstanz for support. PAL acknowledges funding from CGL-2016-77138-C2-2P. We would like to also thank the personnel of the “Centro de Instrumentación Científica” (University of Granada) for their support and help with the ESEM, FESEM and 2D-XRD analyses. In addition, we would like to thank the Particle Analysis Center of the University of Konstanz (funded by SFB1214) for XRD measurements. FDL thanks the Spanish Government (grants CGL2015-70642-R, CGL2015-73103-EXP), the University of Granada (“Unidad Científica de Excelencia” UCE-PP2016-05) and the Junta de Andalucía (grants P11-RNM-7550 and Research Group RNM-179).