Ultrafast charge relocation in an ionic crystal probed by femtosecond x-ray powder diffraction M. Woerner, F. Zamponi, P. Rothhardt, J. Stingl and T. Elsaesser EPJ Web of Conferences, 41 (2013) 03021 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134103021