data_[Mg2Fe2As4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Fe  1.8300  1.4000  0.8525
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [6.6397]
_cell_length_b [8.7923]
_cell_length_c [4.8429]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.2389]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [MgFeAs2O7]
_chemical_formula_sum '[Mg2 Fe2 As4 O14]'
_cell_volume [276.2935]
_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
[
  Mg  Mg0  2  0.0000  0.2393  0.0000  1.0
  Fe  Fe1  2  0.0000  0.8615  0.0000  1.0
  As  As2  4  0.2360  0.5472  0.4002  1.0
  O  O3  4  0.0995  0.0545  0.2749  1.0
  O  O4  4  0.2338  0.7110  0.2122  1.0
  O  O5  4  0.2397  0.3849  0.2042  1.0
  O  O6  2  0.0000  0.5171  0.5000  1.0
]