data_[Tb1Nd1Se3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Nd  1.1400  1.8500  1.2765
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pm]
_cell_length_a [3.7639]
_cell_length_b [18.4844]
_cell_length_c [7.6051]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.9585]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [6]
_chemical_formula_structural [TbNdSe3]
_chemical_formula_sum '[Tb1 Nd1 Se3]'
_cell_volume [528.4137]
_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  0.1217  0.5000  0.5764  1
  Nd  Nd1  1  0.0273  0.5000  0.9996  1
  Se  Se2  2  0.5705  0.4058  0.7809  1
  Se  Se3  1  0.5763  0.5000  0.2953  1
]