data_[Cs2Cu2Ag4Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.7043]
_cell_length_b [5.9216]
_cell_length_c [7.0353]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.9069]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [CsCu(AgSe)2]
_chemical_formula_sum '[Cs2 Cu2 Ag4 Se4]'
_cell_volume [404.0578]
_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  0.0000  0.0000  0.5000  1
  Cu  Cu1  2  0.0000  0.5000  0.0000  1
  Ag  Ag2  4  0.2500  0.2500  0.0000  1
  Se  Se3  4  0.1520  0.5000  0.2561  1
]