data_[Na4Sr8N2]
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 [P2_1/m]
_cell_length_a [7.3387]
_cell_length_b [8.1352]
_cell_length_c [10.7944]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.5531]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Na2Sr4N]
_chemical_formula_sum '[Na4 Sr8 N2]'
_cell_volume [610.9501]
_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  0.2786  0.7500  0.3883  1.0
  Na  Na1  2  0.3614  0.2500  0.0303  1.0
  Sr  Sr2  4  0.2516  0.5127  0.7142  1.0
  Sr  Sr3  2  0.1700  0.7500  0.0117  1.0
  Sr  Sr4  2  0.2076  0.2500  0.3343  1.0
  N  N5  2  0.1256  0.7500  0.7842  1.0
]