data_[Cs2K2Si2Se2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  K  0.8200  2.2000  1.5200
  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 [P-1]
_cell_length_a [6.5994]
_cell_length_b [6.9516]
_cell_length_c [7.7426]
_cell_angle_alpha [66.4850]
_cell_angle_beta [89.0172]
_cell_angle_gamma [66.9878]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [CsKSiSeO2]
_chemical_formula_sum '[Cs2 K2 Si2 Se2 O4]'
_cell_volume [295.6973]
_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
[
  Cs  Cs0  2  0.2492  0.2475  0.1688  1
  K  K1  2  0.0861  0.1894  0.6563  1
  Si  Si2  2  0.4379  0.4500  0.6580  1
  Se  Se3  2  0.2975  0.7671  0.0803  1
  O  O4  2  0.1834  0.5150  0.6877  1
  O  O5  2  0.4916  0.6765  0.5013  1
]