data_stdin
_audit_creation_method 'critic2-4f1eba8'
_cell_length_a         7.1736000000
_cell_length_b         7.1178767061
_cell_length_c        12.3692000000
_cell_angle_alpha        90.0000
_cell_angle_beta        90.0000
_cell_angle_gamma       120.0954
_cell_volume           546.438845
_space_group_crystal_system monoclinic
_space_group_IT_number 15
_space_group_name_H-M_alt 'C2/c'
_space_group_name_Hall '-C 2yc'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
  '-1/2-x,-y,z'
  '-1/2+x,y,-z'
  '-1/2+x,-1/2+y,-1/2+z'
  '-1/2-x,-1/2-y,-1/2-z'
  '-x,-1/2-y,-1/2+z'
  'x,-1/2+y,-1/2-z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si     Si     0.93194000000000     0.85967000000000     0.89167000000000
Si     Si     0.03395000000000     0.49318000000000     0.84201000000000
O      O      0.00000000000000     0.00000000000000     0.00000000000000
O      O      0.25000000000000     0.50000000000000     0.88370000000000
O      O      0.67410000000000     0.73400000000000     0.87660000000000
O      O      0.01680000000000     0.68860000000000     0.89620000000000
O      O      0.46100000000000     0.98280000000000     0.78830000000000
