data_[Sr6Ca8Tl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ca  1.0000  1.8000  1.1400
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.5071]
_cell_length_b [8.2102]
_cell_length_c [17.6818]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Sr3(CaTl)4]
_chemical_formula_sum '[Sr6 Ca8 Tl8]'
_cell_volume [799.4814]
_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  0.0000  0.1138  1.0
  Sr  Sr1  2  0.0000  0.5000  0.0000  1.0
  Ca  Ca2  8  0.0000  0.2130  0.3234  1.0
  Tl  Tl3  4  0.0000  0.3174  0.5000  1.0
  Tl  Tl4  4  0.0000  0.5000  0.1997  1.0
]