1. Department of Earth Science and Engineering; Imperial College London; London UK
2. Center for Electron Nanoscopy; Technical University of Denmark; Kongens Lyngby Denmark
3. School of GeoSciences; University of Edinburgh; Edinburgh UK
4. Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute; Forschungszentrum Jülich; Jülich Germany