data_[Ac4Nd4Sn2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Nd  1.1400  1.8500  1.2765
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.4722]
_cell_length_b [4.4722]
_cell_length_c [19.9212]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ac2Nd2Sn]
_chemical_formula_sum '[Ac4 Nd4 Sn2]'
_cell_volume [398.4302]
_cell_formula_units_Z [2]
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
[
  Ac  Ac0  4  0.0000  0.0000  0.4146  1
  Nd  Nd1  4  0.0000  0.5000  0.2500  1
  Sn  Sn2  2  0.0000  0.0000  0.0000  1
]