data_9011650
_publ_section_title
;
 Effect of pressure on the atom positions in Se and Te
 Locality: synthetic
 Sample: at P = 4.15 GPa
 Note: known as alpha phase with trigonal structure
;
_journal_name_full               'Physical Review B'
_journal_page_first              4404
_journal_page_last               4412
_journal_paper_doi               10.1103/PhysRevB.16.4404
_journal_volume                  16
_journal_year                    1977
_chemical_formula_sum            Se
_chemical_name_common            Selenium
_space_group_IT_number           152
_symmetry_space_group_name_Hall  'P 31 2"'
_symmetry_space_group_name_H-M   'P 31 2 1'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   3.956
_cell_length_b                   3.956
_cell_length_c                   5.069
_cell_volume                     68.701
_diffrn_ambient_pressure         4.15e+06
_exptl_crystal_density_diffrn    5.725
_cod_database_code               9011650
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
y,x,-z
-y,x-y,1/3+z
-x,-x+y,1/3-z
-x+y,-x,2/3+z
x-y,-y,2/3-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Se 0.24810 0.00000 0.33333
