Helium
Schuch A F, Grilly E R, Mills R L
Physical Review 110 (1958) 775-775
Structure of the alpha and beta forms of solid He
Locality: synthetic
Sample: at T = 3.3 K & P = .018 GPa
Note: structure known as the beta form
_database_code_amcsd 0015154
3.46 3.46 5.60 90 90 120 P6_3/mmc
atom   x   y   z
He   1/3 2/3 .25