Selenium
Keller R, Holzapfel W B, Schulz H
Physical Review B16 (1977) 4404-4412
Effect of pressure on the atom positions in Se and Te
Locality: synthetic
Note: known as alpha phase with trigonal structure
_database_code_amcsd 0015161
4.368 4.368 4.958 90 90 120 P3_121
atom     x y   z
Se   .2254 0 1/3