An international research group reports in Nature the observation of the phase transition of a hexagonal close-packed (HCP) crystal structure of hydrogen to a 6-fold larger hydrogen supercell. The findings describe polymerization activity at extreme pressures which reveals how atoms arrange themselves in solid hydrogen and offers clues to the formation of metallic hydrogen. The study includes X-ray diffraction (XRD) data from MAX IV’s NanoMAX beamline.
