data_[Sr2Nb4Hg2O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Nb  1.6000  1.4500  0.8200
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4m2]
_cell_length_a [3.9937]
_cell_length_b [3.9937]
_cell_length_c [20.7137]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [119]
_chemical_formula_structural [SrNb2HgO7]
_chemical_formula_sum '[Sr2 Nb4 Hg2 O14]'
_cell_volume [330.3731]
_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  2  0.0000  0.0000  0.5000  1
  Nb  Nb1  4  0.0000  0.0000  0.1021  1
  Hg  Hg2  2  0.0000  0.5000  0.7500  1
  O  O3  4  0.0000  0.0000  0.1955  1
  O  O4  4  0.0000  0.5000  0.0894  1
  O  O5  4  0.0000  0.5000  0.5941  1
  O  O6  2  0.0000  0.0000  0.0000  1
]