AM_Hydrogen_20 Formula: H Name: Hydrogen Unit cell: 3.661 3.661 5.972 90.0 90.0 120.0 , V=69.32 Space group: P63/MMC (194)

Ishmaev S N , Sadikov I P , Chernyshev A A , Vindryevsky B A , Sukhoparov V A , Telepnev A S , Kobelyev G V , Zhurnal Eksperimental noi i Teoreticheskoi Fiziki , 84 (1983) p.394-403, Neutron structural investigations of solid para-hydrogen at pressures, up to 24 kbar, Locality: synthetic, Sample: at P = .0253 GPa & T = 8.3 K, Note: known as para-hydrogen