data_[K4Nb8Fe4O26]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Nb  1.6000  1.4500  0.8200
  Fe  1.8300  1.4000  0.8525
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.3933]
_cell_length_b [3.9615]
_cell_length_c [9.6359]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.2618]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Nb4Fe2O13]
_chemical_formula_sum '[K4 Nb8 Fe4 O26]'
_cell_volume [615.7615]
_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
[
  K  K0  4  0.0512  0.5000  0.2507  1
  Nb  Nb1  4  0.1191  0.0000  0.5847  1
  Nb  Nb2  4  0.1639  0.0000  0.9361  1
  Fe  Fe3  4  0.2369  0.0000  0.2750  1
  O  O4  4  0.0679  0.0000  0.8031  1
  O  O5  4  0.1245  0.5000  0.6135  1
  O  O6  4  0.1307  0.0000  0.1098  1
  O  O7  4  0.1637  0.0000  0.4225  1
  O  O8  4  0.1999  0.5000  0.9383  1
  O  O9  4  0.2229  0.0000  0.7431  1
  O  O10  2  0.0000  0.0000  0.5000  1
]