data_[Sr2Tl16Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Tl  1.6200  1.9000  1.3325
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.9047]
_cell_length_b [17.1880]
_cell_length_c [6.1394]
_cell_angle_alpha [90.0000]
_cell_angle_beta [129.9142]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Sr(Tl4Pb)2]
_chemical_formula_sum '[Sr2 Tl16 Pb4]'
_cell_volume [720.7292]
_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
[
  Sr  Sr0  2  0.0000  0.0000  0.5000  1
  Tl  Tl1  8  0.2316  0.1354  0.2490  1
  Tl  Tl2  4  0.0000  0.2056  0.5000  1
  Tl  Tl3  4  0.0197  0.5000  0.7727  1
  Pb  Pb4  4  0.0000  0.3235  0.0000  1
]