data_[Na8Sr4Tl4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Tl  1.6200  1.9000  1.3325
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [9.8651]
_cell_length_b [9.8023]
_cell_length_c [6.9818]
_cell_angle_alpha [90.0000]
_cell_angle_beta [133.8573]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2SrTlO4]
_chemical_formula_sum '[Na8 Sr4 Tl4 O16]'
_cell_volume [486.8231]
_cell_formula_units_Z [4]
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  0.0000  0.5000  0.0000  1.0
  Na  Na1  4  0.2500  0.2500  0.0000  1.0
  Sr  Sr2  4  0.2500  0.2500  0.5000  1.0
  Tl  Tl3  4  0.0000  0.0000  0.0000  1.0
  O  O4  8  0.0025  0.2241  0.0036  1.0
  O  O5  8  0.2351  0.0031  0.0087  1.0
]