data_[Tb4Er6Cu6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.5252]
_cell_length_b [5.0530]
_cell_length_c [20.7934]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Tb2(ErCu)3]
_chemical_formula_sum '[Tb4 Er6 Cu6]'
_cell_volume [370.3900]
_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
[
  Tb  Tb0  4  0.0000  0.5000  0.2743  1
  Er  Er1  4  0.0000  0.0000  0.3850  1
  Er  Er2  2  0.0000  0.5000  0.5000  1
  Cu  Cu3  4  0.0000  0.0000  0.1131  1
  Cu  Cu4  2  0.0000  0.5000  0.0000  1
]