data_[Sm4Er8Tl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.2317]
_cell_length_b [5.2640]
_cell_length_c [9.1581]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.5689]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Sm(ErTl)2]
_chemical_formula_sum '[Sm4 Er8 Tl8]'
_cell_volume [570.7116]
_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  0.0647  0.0000  0.3527  1.0
  Er  Er1  4  0.0685  0.5000  0.8605  1.0
  Er  Er2  4  0.2476  0.5000  0.2469  1.0
  Tl  Tl3  4  0.1347  0.0000  0.0410  1.0
  Tl  Tl4  4  0.1360  0.5000  0.5529  1.0
]