data_[Rb2Tb1Nd1Se4]
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
  Nd  1.1400  1.8500  1.2765
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.4832]
_cell_length_b [4.3203]
_cell_length_c [8.3920]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2713]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [Rb2TbNdSe4]
_chemical_formula_sum '[Rb2 Tb1 Nd1 Se4]'
_cell_volume [259.0776]
_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
[
  Rb  Rb0  1  0.0000  0.5000  0.5000  1.0
  Rb  Rb1  1  0.5000  0.0000  0.5000  1.0
  Tb  Tb2  1  0.5000  0.5000  0.0000  1.0
  Nd  Nd3  1  0.0000  0.0000  0.0000  1.0
  Se  Se4  2  0.2395  0.5000  0.1998  1.0
  Se  Se5  2  0.2738  0.0000  0.8028  1.0
]