data_[Na2Ta4Tl4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ta  1.5000  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 [5.6770]
_cell_length_b [5.5925]
_cell_length_c [11.1538]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.9126]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaTa2Tl2O7]
_chemical_formula_sum '[Na2 Ta4 Tl4 O14]'
_cell_volume [349.8491]
_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
[
  Na  Na0  2  0.0000  0.0000  0.0000  1.0
  Ta  Ta1  4  0.0714  0.5000  0.1806  1.0
  Tl  Tl2  4  0.1823  0.0000  0.3944  1.0
  O  O3  8  0.1971  0.2527  0.8216  1.0
  O  O4  4  0.0980  0.5000  0.3642  1.0
  O  O5  2  0.0000  0.5000  0.0000  1.0
]