data_[Nd12Sn4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [7.5259]
_cell_length_b [13.0319]
_cell_length_c [7.5308]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.4288]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Nd3SnSe2]
_chemical_formula_sum '[Nd12 Sn4 Se8]'
_cell_volume [696.5388]
_cell_formula_units_Z [4]
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
[
  Nd  Nd0  8  0.2407  0.0859  0.9969  1.0
  Nd  Nd1  4  0.2500  0.2500  0.5000  1.0
  Sn  Sn2  4  0.0000  0.4188  0.2500  1.0
  Se  Se3  4  0.0000  0.0837  0.2500  1.0
  Se  Se4  4  0.0000  0.2526  0.7500  1.0
]