data_[Tb12Mg4Ag4]
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
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [5.1919]
_cell_length_b [20.1765]
_cell_length_c [5.1842]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Tb3MgAg]
_chemical_formula_sum '[Tb12 Mg4 Ag4]'
_cell_volume [543.0675]
_cell_formula_units_Z [4]
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  0.0630  0.2500  1
  Tb  Tb1  4  0.0000  0.2507  0.2500  1
  Tb  Tb2  4  0.0000  0.4418  0.2500  1
  Mg  Mg3  4  0.0000  0.3464  0.7500  1
  Ag  Ag4  4  0.0000  0.1619  0.7500  1
]