data_[Na6Sr14N4]
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 [Cmmm]
_cell_length_a [5.4750]
_cell_length_b [28.3470]
_cell_length_c [5.4710]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Na3Sr7N2]
_chemical_formula_sum '[Na6 Sr14 N4]'
_cell_volume [849.1047]
_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  0.0000  0.2932  0.5000  1
  Na  Na1  2  0.0000  0.5000  0.5000  1
  Sr  Sr2  4  0.0000  0.0954  0.5000  1
  Sr  Sr3  4  0.0000  0.1866  0.0000  1
  Sr  Sr4  4  0.0000  0.4043  0.0000  1
  Sr  Sr5  2  0.0000  0.0000  0.0000  1
  N  N6  4  0.0000  0.0984  0.0000  1
]