data_[Dy6Er18Se36]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Dy  1.2200  1.7500  1.1310
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [11.8933]
_cell_length_b [11.8933]
_cell_length_c [14.2362]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Dy(ErSe2)3]
_chemical_formula_sum '[Dy6 Er18 Se36]'
_cell_volume [1743.9395]
_cell_formula_units_Z [6]
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  3  0.0000  0.0000  0.0000  1
  Dy  Dy1  3  0.0000  0.0000  0.5000  1
  Er  Er2  18  0.0529  0.7812  0.7017  1
  Se  Se3  18  0.0182  0.8052  0.8958  1
  Se  Se4  18  0.0323  0.8369  0.3738  1
]