data_[Tm4Nb4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tm  1.2500  1.7500  1.0950
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.4664]
_cell_length_b [9.5387]
_cell_length_c [5.6288]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.9527]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tm2Nb2O7]
_chemical_formula_sum '[Tm4 Nb4 O14]'
_cell_volume [340.8670]
_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
[
  Tm  Tm0  4  0.0000  0.3142  0.0000  1
  Nb  Nb1  4  0.2284  0.5000  0.6022  1
  O  O2  8  0.2333  0.1740  0.2093  1
  O  O3  4  0.0798  0.5000  0.2475  1
  O  O4  2  0.0000  0.0000  0.5000  1
]