data_[Na12Sr12N4]
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 [10.0199]
_cell_length_b [11.8774]
_cell_length_c [9.9473]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.8584]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3Sr3N]
_chemical_formula_sum '[Na12 Sr12 N4]'
_cell_volume [1144.2441]
_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  0.0000  0.1425  0.5000  1.0
  Na  Na1  4  0.0000  0.3541  0.0000  1.0
  Na  Na2  4  0.1292  0.5000  0.3623  1.0
  Sr  Sr3  8  0.2458  0.1604  0.2565  1.0
  Sr  Sr4  4  0.1122  0.0000  0.8966  1.0
  N  N5  4  0.1388  0.0000  0.1471  1.0
]