Helium
Schuch A F, Mills R L
Physical Review Letters 6 (1961) 596-597
New allotropic form of He3
Locality: synthetic
Sample: at T = 15.98 K & P = .136 GPa
_database_code_amcsd 0015272
3.046 3.046 4.986 90 90 120 P6_3/mmc
atom   x   y   z
He   1/3 2/3 .25