data_[Sr8Tl4C2O18]
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
  C  2.5500  0.7000  0.3000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [5.1299]
_cell_length_b [19.0862]
_cell_length_c [5.0833]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [Sr4Tl2CO9]
_chemical_formula_sum '[Sr8 Tl4 C2 O18]'
_cell_volume [497.7022]
_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  4  0.0000  0.1134  0.5255  1.0
  Sr  Sr1  4  0.0000  0.3887  0.5110  1.0
  Tl  Tl2  4  0.0000  0.2526  0.0100  1.0
  C  C3  2  0.0000  0.0000  0.0217  1.0
  O  O4  4  0.0000  0.1415  0.0161  1.0
  O  O5  4  0.0000  0.2505  0.5076  1.0
  O  O6  4  0.0000  0.3654  0.0094  1.0
  O  O7  4  0.2188  0.0000  0.8925  1.0
  O  O8  2  0.0000  0.0000  0.2772  1.0
]