data_[Na4Tl2V2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
  V  1.6300  1.3500  0.7775
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [7.9421]
_cell_length_b [5.9108]
_cell_length_c [5.8685]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2TlVO4]
_chemical_formula_sum '[Na4 Tl2 V2 O8]'
_cell_volume [275.4912]
_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  4  0.2467  0.3288  0.0077  1.0
  Tl  Tl1  2  0.0000  0.1632  0.5401  1.0
  V  V2  2  0.0000  0.8076  0.9928  1.0
  O  O3  4  0.1798  0.6971  0.1230  1.0
  O  O4  2  0.0000  0.1053  0.0030  1.0
  O  O5  2  0.0000  0.7345  0.7027  1.0
]