data_[Na6Sm2Tl4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sm  1.1700  1.8500  1.2290
  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 [5.9355]
_cell_length_b [10.2986]
_cell_length_c [5.9962]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.0336]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3SmTl2O6]
_chemical_formula_sum '[Na6 Sm2 Tl4 O12]'
_cell_volume [346.4910]
_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  0.0000  0.1751  0.5000  1.0
  Na  Na1  2  0.0000  0.5000  0.5000  1.0
  Sm  Sm2  2  0.0000  0.0000  0.0000  1.0
  Tl  Tl3  4  0.0000  0.3339  0.0000  1.0
  O  O4  8  0.2427  0.8319  0.2252  1.0
  O  O5  4  0.2385  0.5000  0.2271  1.0
]