data_[K4Mg2Fe8O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Mg  1.3100  1.5000  0.8600
  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 [5.2459]
_cell_length_b [9.0541]
_cell_length_c [8.3785]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.2269]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2MgFe4O7]
_chemical_formula_sum '[K4 Mg2 Fe8 O14]'
_cell_volume [397.9474]
_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  0.0000  0.3314  0.0000  1
  Mg  Mg1  2  0.0000  0.0000  0.5000  1
  Fe  Fe2  4  0.0000  0.3297  0.5000  1
  Fe  Fe3  4  0.0321  0.0000  0.7760  1
  O  O4  8  0.1634  0.1668  0.3625  1
  O  O5  4  0.1633  0.5000  0.3622  1
  O  O6  2  0.0000  0.0000  0.0000  1
]