data_[Sm8U2N8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  U  1.3800  1.7500  0.9913
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [5.7267]
_cell_length_b [5.7267]
_cell_length_c [11.3521]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [Sm4UN4]
_chemical_formula_sum '[Sm8 U2 N8]'
_cell_volume [372.2983]
_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
[
  Sm  Sm0  4  0.0000  0.0000  0.2868  1
  Sm  Sm1  4  0.0000  0.5000  0.0000  1
  U  U2  2  0.0000  0.0000  0.0000  1
  N  N3  8  0.2106  0.2106  0.1285  1
]