data_[Sr6Mg2Fe4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  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 [20.4814]
_cell_length_b [3.7726]
_cell_length_c [5.5066]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.7877]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Sr3MgFe2O7]
_chemical_formula_sum '[Sr6 Mg2 Fe4 O14]'
_cell_volume [413.2197]
_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
[
  Sr  Sr0  4  0.1801  0.5000  0.7952  1
  Sr  Sr1  2  0.0000  0.5000  0.5000  1
  Mg  Mg2  2  0.0000  0.5000  0.0000  1
  Fe  Fe3  4  0.1120  0.0000  0.1780  1
  O  O4  4  0.0945  0.0000  0.5089  1
  O  O5  4  0.0953  0.5000  0.0464  1
  O  O6  4  0.1991  0.0000  0.1141  1
  O  O7  2  0.0000  0.0000  0.0000  1
]