data_[Dy4Cu2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Dy  1.2200  1.7500  1.1310
  Cu  1.9000  1.3500  0.8200
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.0531]
_cell_length_b [5.9272]
_cell_length_c [8.1092]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.6307]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Dy2CuSe4]
_chemical_formula_sum '[Dy4 Cu2 Se8]'
_cell_volume [324.8200]
_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
[
  Dy  Dy0  2  0.2273  0.7500  0.9303  1.0
  Dy  Dy1  2  0.2421  0.7500  0.4355  1.0
  Cu  Cu2  2  0.2374  0.2500  0.1835  1.0
  Se  Se3  4  0.4837  0.0093  0.7468  1.0
  Se  Se4  2  0.0682  0.2500  0.8825  1.0
  Se  Se5  2  0.0708  0.2500  0.4022  1.0
]