data_[Si2Os2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Os  2.2000  1.3000  0.6730
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [7.9959]
_cell_length_b [3.6981]
_cell_length_c [6.3034]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.3061]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [SiOsSe2]
_chemical_formula_sum '[Si2 Os2 Se4]'
_cell_volume [174.8067]
_cell_formula_units_Z [2]
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
[
  Si  Si0  2  0.4046  0.0000  0.3715  1
  Os  Os1  2  0.2045  0.5000  0.3755  1
  Se  Se2  2  0.1089  0.0000  0.0792  1
  Se  Se3  2  0.2820  0.0000  0.6738  1
]