data_[Fe6Sn3As3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Fe  1.8300  1.4000  0.8525
  Sn  1.9600  1.4500  0.8300
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.3238]
_cell_length_b [5.3238]
_cell_length_c [14.6375]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Fe2SnAsO6]
_chemical_formula_sum '[Fe6 Sn3 As3 O18]'
_cell_volume [359.2898]
_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  3  0.0000  0.0000  0.0230  1
  Fe  Fe1  3  0.0000  0.0000  0.5128  1
  Sn  Sn2  3  0.0000  0.0000  0.8124  1
  As  As3  3  0.0000  0.0000  0.3006  1
  O  O4  9  0.0041  0.2998  0.9137  1
  O  O5  9  0.0137  0.6792  0.0875  1
]