data_[Ho12Nb4O28]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ho  1.2300  1.7500  1.0410
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C222_1]
_cell_length_a [7.5872]
_cell_length_b [10.5289]
_cell_length_c [7.4501]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [20]
_chemical_formula_structural [Ho3NbO7]
_chemical_formula_sum '[Ho12 Nb4 O28]'
_cell_volume [595.1478]
_cell_formula_units_Z [4]
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
[
  Ho  Ho0  8  0.2317  0.2319  0.2390  1
  Ho  Ho1  4  0.0415  0.5000  0.0000  1
  Nb  Nb2  4  0.0028  0.0000  0.0000  1
  O  O3  8  0.1762  0.1295  0.9499  1
  O  O4  8  0.2090  0.1238  0.5221  1
  O  O5  4  0.0000  0.0736  0.2500  1
  O  O6  4  0.0000  0.3597  0.2500  1
  O  O7  4  0.0000  0.3712  0.7500  1
]