AM_Helium_1 Formula: He Name: Helium Unit cell: 3.53 3.53 5.76 90.0 90.0 120.0 , V=62.16 Space group: P63/MMC (194)

Henshaw D G , Physical Review , 109 (1958) p.328-330, Structure of solid helium by neutron diffraction, Locality: synthetic, Sample: at T = 1.1 K and P = .007 GPa