data_[Na4Sr12N2]
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 [14.4934]
_cell_length_b [4.2445]
_cell_length_c [13.7967]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.1870]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Sr6N]
_chemical_formula_sum '[Na4 Sr12 N2]'
_cell_volume [845.2541]
_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  4  0.0725  0.5000  0.3494  1
  Sr  Sr1  4  0.0864  0.0000  0.8567  1
  Sr  Sr2  4  0.1464  0.0000  0.1038  1
  Sr  Sr3  4  0.1941  0.5000  0.6158  1
  N  N4  2  0.0000  0.0000  0.0000  1
]