data_[Sr2Mg6Tl9]
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
]
_symmetry_space_group_name_H-M [P6/mmm]
_cell_length_a [6.5388]
_cell_length_b [6.5388]
_cell_length_c [14.2341]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [191]
_chemical_formula_structural [Sr2(Mg2Tl3)3]
_chemical_formula_sum '[Sr2 Mg6 Tl9]'
_cell_volume [527.0502]
_cell_formula_units_Z [1]
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  0.3242  1
  Mg  Mg1  4  0.3333  0.6667  0.6671  1
  Mg  Mg2  2  0.3333  0.6667  0.0000  1
  Tl  Tl3  6  0.0000  0.5000  0.1666  1
  Tl  Tl4  3  0.0000  0.5000  0.5000  1
]