data_[Cs8Cu12Se16]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [6.4386]
_cell_length_b [10.6515]
_cell_length_c [15.7162]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Cs2Cu3Se4]
_chemical_formula_sum '[Cs8 Cu12 Se16]'
_cell_volume [1077.8301]
_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  8  0.0000  0.0000  0.3368  1.0
  Cu  Cu1  8  0.2500  0.2500  0.0000  1.0
  Cu  Cu2  4  0.0000  0.0000  0.0000  1.0
  Se  Se3  16  0.0000  0.1690  0.1054  1.0
]