data_[Dy3Y6Er3Se18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Dy  1.2200  1.7500  1.1310
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.2007]
_cell_length_b [7.2007]
_cell_length_c [19.4653]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [DyY2ErSe6]
_chemical_formula_sum '[Dy3 Y6 Er3 Se18]'
_cell_volume [874.0533]
_cell_formula_units_Z [3]
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
[
  Y  Y0  3  0.0000  0.0000  0.0140  1.0
  Y  Y1  3  0.0000  0.0000  0.5147  1.0
  Dy  Dy2  3  0.0000  0.0000  0.8183  1.0
  Er  Er3  3  0.0000  0.0000  0.3191  1.0
  Se  Se4  9  0.0016  0.6967  0.4157  1.0
  Se  Se5  9  0.0046  0.3086  0.9160  1.0
]