data_[Tb6Mg4Cu8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Mg  1.3100  1.5000  0.8600
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.6171]
_cell_length_b [4.3647]
_cell_length_c [8.7770]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.2350]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tb3(MgCu2)2]
_chemical_formula_sum '[Tb6 Mg4 Cu8]'
_cell_volume [367.8314]
_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  0.1333  0.5000  0.3861  1.0
  Tb  Tb1  2  0.0000  0.0000  0.0000  1.0
  Mg  Mg2  4  0.1737  0.5000  0.7792  1.0
  Cu  Cu3  4  0.0712  0.0000  0.6252  1.0
  Cu  Cu4  4  0.2120  0.5000  0.0750  1.0
]