data_[Tb2Tl2Ag6Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Tl  1.6200  1.9000  1.3325
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.2196]
_cell_length_b [7.5995]
_cell_length_c [10.4396]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.5984]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [TbTlAg3Se4]
_chemical_formula_sum '[Tb2 Tl2 Ag6 Se8]'
_cell_volume [475.2585]
_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
[
  Tb  Tb0  2  0.4054  0.7500  0.7019  1
  Tl  Tl1  2  0.2782  0.7500  0.0986  1
  Ag  Ag2  4  0.2013  0.0583  0.4649  1
  Ag  Ag3  2  0.0456  0.2500  0.1999  1
  Se  Se4  4  0.1440  0.0300  0.7305  1
  Se  Se5  2  0.3019  0.2500  0.0499  1
  Se  Se6  2  0.4372  0.7500  0.4345  1
]