data_[Tb3Nd3Er6Se18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Nd  1.1400  1.8500  1.2765
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.2566]
_cell_length_b [7.2566]
_cell_length_c [19.4413]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [TbNd(ErSe3)2]
_chemical_formula_sum '[Tb3 Nd3 Er6 Se18]'
_cell_volume [886.5964]
_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
[
  Tb  Tb0  3  0.0000  0.0000  0.3169  1.0
  Nd  Nd1  3  0.0000  0.0000  0.8126  1.0
  Er  Er2  3  0.0000  0.0000  0.0118  1.0
  Er  Er3  3  0.0000  0.0000  0.5144  1.0
  Se  Se4  9  0.0313  0.3554  0.5846  1.0
  Se  Se5  9  0.0453  0.6888  0.0841  1.0
]