data_stdin
_audit_creation_method 'critic2-4f1eba8'
_cell_length_a         5.0130000000
_cell_length_b         5.0130000000
_cell_length_c         5.4700000000
_cell_angle_alpha        90.0000
_cell_angle_beta        90.0000
_cell_angle_gamma       120.0000
_cell_volume           119.045605
_space_group_crystal_system hexagonal
_space_group_IT_number 180
_space_group_name_H-M_alt 'P6_222'
_space_group_name_Hall 'P 62 2c (0 0 1)'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x-y,x,-2/3+z'
  '-y,x-y,-1/3+z'
  '-x,-y,z'
  '-x+y,-x,-2/3+z'
  'y,-x+y,-1/3+z'
  '-y,-x,-1/3-z'
  '-x,-x+y,-2/3-z'
  '-x+y,y,-z'
  'y,x,-1/3-z'
  'x,x-y,-2/3-z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si     Si     0.50000000000000     0.50000000000000     0.33333333000000
O      O      0.19700000000000     0.80300000000000     0.83333330000000
