data_[Na4Sr2Cr4N8]
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
  Cr  1.6600  1.4000  0.9400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.5505]
_cell_length_b [3.3716]
_cell_length_c [8.8566]
_cell_angle_alpha [90.0000]
_cell_angle_beta [126.0283]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Sr(CrN2)2]
_chemical_formula_sum '[Na4 Sr2 Cr4 N8]'
_cell_volume [278.9391]
_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  0.1235  0.0000  0.7187  1.0
  Sr  Sr1  2  0.0000  0.0000  0.0000  1.0
  Cr  Cr2  4  0.1686  0.5000  0.3771  1.0
  N  N3  4  0.0111  0.5000  0.7859  1.0
  N  N4  4  0.2425  0.0000  0.3577  1.0
]