data_[Na2Sr4Fe12As12]
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
  Fe  1.8300  1.4000  0.8525
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.2617]
_cell_length_b [5.5159]
_cell_length_c [6.5174]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.8840]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSr2(FeAs)6]
_chemical_formula_sum '[Na2 Sr4 Fe12 As12]'
_cell_volume [546.1885]
_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  0.0000  0.0000  0.0000  1.0
  Sr  Sr1  4  0.1630  0.5000  0.3253  1.0
  Fe  Fe2  8  0.1667  0.2500  0.8318  1.0
  Fe  Fe3  4  0.0000  0.2497  0.5000  1.0
  As  As4  4  0.0491  0.5000  0.8104  1.0
  As  As5  4  0.1198  0.0000  0.5256  1.0
  As  As6  4  0.2148  0.0000  0.1387  1.0
]