data_[Fe9Sb3O21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Fe  1.8300  1.4000  0.8525
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [8.4407]
_cell_length_b [8.4407]
_cell_length_c [7.1850]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [Fe3SbO7]
_chemical_formula_sum '[Fe9 Sb3 O21]'
_cell_volume [443.3114]
_cell_formula_units_Z [3]
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
[
  Fe  Fe0  9  0.0831  0.5416  0.9476  1
  Sb  Sb1  3  0.0000  0.0000  0.8648  1
  O  O2  9  0.2048  0.4096  0.0562  1
  O  O3  9  0.2073  0.4145  0.4862  1
  O  O4  3  0.0000  0.0000  0.1338  1
]