data_[Rb2Tb4Cu4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tb  1.1000  1.7500  0.9815
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [4.2476]
_cell_length_b [19.3600]
_cell_length_c [3.8372]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Rb(TbCu)2]
_chemical_formula_sum '[Rb2 Tb4 Cu4]'
_cell_volume [315.5442]
_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
[
  Rb  Rb0  2  0.0000  0.0000  0.0000  1
  Tb  Tb1  4  0.0000  0.3233  0.5000  1
  Cu  Cu2  4  0.0000  0.2113  0.0000  1
]