AM_Hydrogen_3 Formula: H Name: Hydrogen Unit cell: 2.308 2.308 3.703 90.0 90.0 120.0 , V=17.08 Space group: P63/MMC (194)

Mao H K , Jephcoat A P , Hemley R J , Finger L W , Zha C S , Hazen R M , Cox D E , Science , 239 (1988) p.1131-1133, Synchrotron X-ray diffraction measurements of single-crystal hydrogen to, 26.5 Gigapascals, Locality: synthetic, Sample: at P = 21.4 GPa, T = 300 K