data_[K4Na8Fe4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Fe  1.8300  1.4000  0.8525
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [6.6244]
_cell_length_b [6.3701]
_cell_length_c [10.3227]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [KNa2FeO3]
_chemical_formula_sum '[K4 Na8 Fe4 O12]'
_cell_volume [435.5975]
_cell_formula_units_Z [4]
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
[
  K  K0  4  0.1623  0.7500  0.4747  1
  Na  Na1  8  0.0065  0.5061  0.7695  1
  Fe  Fe2  4  0.1700  0.7500  0.0076  1
  O  O3  4  0.0000  0.0000  0.0000  1
  O  O4  4  0.1671  0.2500  0.3587  1
  O  O5  4  0.2064  0.2500  0.6711  1
]