data_[Nb8Tl2O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nb  1.6000  1.4500  0.8200
  Tl  1.6200  1.9000  1.3325
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.1148]
_cell_length_b [3.0368]
_cell_length_c [10.5460]
_cell_angle_alpha [90.0000]
_cell_angle_beta [133.8757]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Nb4TlO8]
_chemical_formula_sum '[Nb8 Tl2 O16]'
_cell_volume [348.9450]
_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  4  0.1607  0.0000  0.8060  1
  Nb  Nb1  4  0.1642  0.5000  0.4786  1
  Tl  Tl2  2  0.0000  0.5000  0.0000  1
  O  O3  4  0.0348  0.5000  0.7052  1
  O  O4  4  0.1373  0.0000  0.3161  1
  O  O5  4  0.1591  0.0000  0.6192  1
  O  O6  4  0.2030  0.0000  0.0460  1
]