data_[Na4Sr16N4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.7204]
_cell_length_b [7.8286]
_cell_length_c [6.7566]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.1634]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSr4N]
_chemical_formula_sum '[Na4 Sr16 N4]'
_cell_volume [1001.8709]
_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
[
  Na  Na0  4  0.1879  0.0000  0.2244  1.0
  Sr  Sr1  8  0.1105  0.2706  0.6628  1.0
  Sr  Sr2  4  0.0000  0.2873  0.0000  1.0
  Sr  Sr3  4  0.1886  0.5000  0.1751  1.0
  N  N4  4  0.0822  0.5000  0.8849  1.0
]