data_NaTl2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.96
_cell_length_b   3.96
_cell_length_c   7.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaTl2Sn
_chemical_formula_sum   'Na1 Tl2 Sn1'
_cell_volume   116.42
_cell_formula_units_Z   1
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  1  0.0  0.0  0.74  1.0
  Tl  Tl2  1  0.0  0.0  0.33  1.0
  Tl  Tl3  1  0.98  0.98  0.84  1.0
  Sn  Sn1  1  0.98  0.98  0.61  1.0

data_NaTl2Sn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.61
_cell_length_b   5.61
_cell_length_c   7.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaTl2Sn
_chemical_formula_sum   'Na2 Tl4 Sn2'
_cell_volume   232.84
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.0  0.0  0.74  1.0
  Tl  Tl1  2  0.0  0.0  0.33  1.0
  Tl  Tl2  2  0.48  0.5  0.84  1.0
  Sn  Sn3  2  0.48  0.5  0.61  1.0

Na Tl Tl Sn
Na Tl Tl Sn 0 2 - - o 0 3 - - o 1 3 - - o 