data_[Na2Sm2N4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sm  1.1700  1.8500  1.2290
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4]
_cell_length_a [4.6575]
_cell_length_b [4.6575]
_cell_length_c [11.8447]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [NaSm(NO4)2]
_chemical_formula_sum '[Na2 Sm2 N4 O16]'
_cell_volume [256.9372]
_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
[
  Na  Na0  2  0.0000  0.5000  0.2500  1
  Sm  Sm1  2  0.0000  0.0000  0.0000  1
  N  N2  2  0.0000  0.0000  0.5000  1
  N  N3  2  0.0000  0.5000  0.7500  1
  O  O4  8  0.0602  0.2402  0.4370  1
  O  O5  8  0.0730  0.7333  0.8141  1
]