data_[Na10Sr8N2]
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 [18.4654]
_cell_length_b [3.9379]
_cell_length_c [10.9814]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.0003]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na5Sr4N]
_chemical_formula_sum '[Na10 Sr8 N2]'
_cell_volume [786.3736]
_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  0.1730  0.0000  0.7110  1.0
  Na  Na1  4  0.1766  0.0000  0.3888  1.0
  Na  Na2  2  0.0000  0.5000  0.5000  1.0
  Sr  Sr3  4  0.0005  0.0000  0.1608  1.0
  Sr  Sr4  4  0.1467  0.5000  0.0401  1.0
  N  N5  2  0.0000  0.5000  0.0000  1.0
]