data_[Cs8Si4Se4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Si  1.9000  1.1000  0.5400
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.1410]
_cell_length_b [6.9836]
_cell_length_c [9.5098]
_cell_angle_alpha [90.0000]
_cell_angle_beta [125.3188]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Cs2SiSeO2]
_chemical_formula_sum '[Cs8 Si4 Se4 O8]'
_cell_volume [657.9125]
_cell_formula_units_Z [4]
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
[
  Cs  Cs0  4  0.0787  0.0000  0.3727  1
  Cs  Cs1  4  0.1776  0.5000  0.8219  1
  Si  Si2  4  0.1358  0.5000  0.1993  1
  Se  Se3  4  0.0000  0.2519  0.0000  1
  O  O4  4  0.1201  0.5000  0.3553  1
  O  O5  4  0.2178  0.0000  0.7645  1
]