data_[Nb4O10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.8029]
_cell_length_b [3.8571]
_cell_length_c [7.8264]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.1201]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Nb2O5]
_chemical_formula_sum '[Nb4 O10]'
_cell_volume [205.3598]
_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
[
  Nb  Nb0  2  0.1948  0.2500  0.0939  1.0
  Nb  Nb1  2  0.2681  0.7500  0.7233  1.0
  O  O2  2  0.0305  0.2500  0.2845  1.0
  O  O3  2  0.1440  0.7500  0.0312  1.0
  O  O4  2  0.2556  0.2500  0.8128  1.0
  O  O5  2  0.3180  0.7500  0.5064  1.0
  O  O6  2  0.4462  0.2500  0.1744  1.0
]