data_[Tb3Tm1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [Pmm2]
_cell_length_a [3.6302]
_cell_length_b [5.6140]
_cell_length_c [6.3016]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [25]
_chemical_formula_structural [Tb3Tm]
_chemical_formula_sum '[Tb3 Tm1]'
_cell_volume [128.4281]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.3326  1.0
  Tb  Tb1  1  0.5000  0.0000  0.4989  1.0
  Tb  Tb2  1  0.5000  0.5000  0.8341  1.0
  Tm  Tm3  1  0.0000  0.0000  0.0009  1.0
]