data_[Sm4Mg4Tl4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Mg  1.3100  1.5000  0.8600
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [7.5820]
_cell_length_b [4.7841]
_cell_length_c [8.7280]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [SmMgTl]
_chemical_formula_sum '[Sm4 Mg4 Tl4]'
_cell_volume [316.5947]
_cell_formula_units_Z [4]
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
[
  Sm  Sm0  4  0.0132  0.2500  0.2049  1
  Mg  Mg1  4  0.1714  0.2500  0.5712  1
  Tl  Tl2  4  0.2407  0.7500  0.3986  1
]