data_[Tb36Pm21Mg3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [12.0167]
_cell_length_b [12.0167]
_cell_length_c [16.0327]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Tb12Pm7Mg]
_chemical_formula_sum '[Tb36 Pm21 Mg3]'
_cell_volume [2004.9712]
_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  18  0.0329  0.4559  0.7179  1
  Tb  Tb1  18  0.0538  0.5843  0.0840  1
  Pm  Pm2  18  0.0579  0.1877  0.7916  1
  Pm  Pm3  3  -0.0000  0.0000  0.5000  1
  Mg  Mg4  3  0.0000  0.0000  0.0000  1
]