data_[Eu2Cu2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Eu  1.2000  1.8500  1.1985
  Cu  1.9000  1.3500  0.8200
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [6.5617]
_cell_length_b [4.1593]
_cell_length_c [7.3513]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0551]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [EuCuSe2]
_chemical_formula_sum '[Eu2 Cu2 Se4]'
_cell_volume [200.6305]
_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
[
  Eu  Eu0  1  0.0000  0.0000  0.0000  1.0
  Eu  Eu1  1  0.0000  0.5000  0.5000  1.0
  Cu  Cu2  2  0.3648  0.5000  0.1667  1.0
  Se  Se3  2  0.2628  0.5000  0.8409  1.0
  Se  Se4  2  0.2630  0.0000  0.3251  1.0
]