data_[Sr2Mg2Tl4Pb2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Mg  1.3100  1.5000  0.8600
  Tl  1.6200  1.9000  1.3325
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [6.3686]
_cell_length_b [7.0422]
_cell_length_c [6.9697]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [SrMgTl2Pb]
_chemical_formula_sum '[Sr2 Mg2 Tl4 Pb2]'
_cell_volume [312.5843]
_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  0.2500  0.5000  0.2353  1.0
  Mg  Mg1  2  0.0000  0.0000  0.0000  1.0
  Tl  Tl2  4  0.2500  0.2667  0.7360  1.0
  Pb  Pb3  2  0.2500  0.0000  0.3755  1.0
]