data_global
_chemical_name_mineral 'Silicon'
loop_
_publ_author_name
'Hanfland M'
'Schwarz U'
'Syassen K'
'Takemura K'
_journal_name_full 'Physical Review Letters'
_journal_volume 82 
_journal_year 1999
_journal_page_first 1197
_journal_page_last 1200
_publ_section_title
;
 Crystal structure of the high-pressure phase silicon VI
 Sample: at P = 45.5 GPa
 Note: phase VI
;
_database_code_amcsd 0015283
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Si'
_cell_length_a 7.9200
_cell_length_b 4.7586
_cell_length_c 4.7361
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 178.495
_exptl_crystal_density_diffrn      4.180
_symmetry_space_group_name_H-M 'C m c a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,1/2-y,1/2+z'
  '1/2+x,-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2-x,+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,z'
  'x,-y,-z'
  '1/2+x,1/2-y,-z'
  'x,1/2+y,1/2-z'
  '1/2+x,+y,1/2-z'
  '-x,1/2-y,1/2+z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1   0.00000   0.17300   0.32400
Si2   0.22400   0.00000   0.00000