data_[Sm4Tl6Cr2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Tl  1.6200  1.9000  1.3325
  Cr  1.6600  1.4000  0.9400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.1429]
_cell_length_b [12.3533]
_cell_length_c [8.0863]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.0500]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Sm2Tl3CrSe6]
_chemical_formula_sum '[Sm4 Tl6 Cr2 Se12]'
_cell_volume [682.1664]
_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
[
  Sm  Sm0  4  0.0000  0.3341  0.0000  1.0
  Tl  Tl1  4  0.0000  0.1762  0.5000  1.0
  Tl  Tl2  2  0.0000  0.5000  0.5000  1.0
  Cr  Cr3  2  0.0000  0.0000  0.0000  1.0
  Se  Se4  8  0.2158  0.1508  0.1959  1.0
  Se  Se5  4  0.2338  0.0000  0.7940  1.0
]