data_[Rb4Tl8Sn4Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [14.5564]
_cell_length_b [14.0089]
_cell_length_c [8.9733]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.7681]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbTl2SnSe6]
_chemical_formula_sum '[Rb4 Tl8 Sn4 Se24]'
_cell_volume [1555.6930]
_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
[
  Rb  Rb0  4  0.0000  0.1792  0.2500  1
  Tl  Tl1  8  0.1876  0.4106  0.0586  1
  Sn  Sn2  4  0.0000  0.1367  0.7500  1
  Se  Se3  8  0.0926  0.4452  0.2986  1
  Se  Se4  8  0.1079  0.0302  0.6561  1
  Se  Se5  8  0.1366  0.2157  0.0387  1
]