data_[Ca6Mg4Tl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Mg  1.3100  1.5000  0.8600
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.6486]
_cell_length_b [5.1257]
_cell_length_c [9.6128]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.9404]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Ca3(MgTl2)2]
_chemical_formula_sum '[Ca6 Mg4 Tl8]'
_cell_volume [511.6657]
_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
[
  Ca  Ca0  4  0.1486  0.5000  0.6814  1.0
  Ca  Ca1  2  0.0000  0.0000  0.0000  1.0
  Mg  Mg2  4  0.1556  0.5000  0.3310  1.0
  Tl  Tl3  4  0.0568  0.0000  0.3787  1.0
  Tl  Tl4  4  0.2344  0.5000  0.0807  1.0
]