data_[Tb12Y3Mg3Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Y  1.2200  1.8000  1.0400
  Mg  1.3100  1.5000  0.8600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [8.3757]
_cell_length_b [8.3757]
_cell_length_c [20.5085]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [Tb4YMgSe8]
_chemical_formula_sum '[Tb12 Y3 Mg3 Se24]'
_cell_volume [1245.9746]
_cell_formula_units_Z [3]
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  9  0.1713  0.3426  0.8321  1.0
  Tb  Tb1  3  0.0000  0.0000  0.6249  1.0
  Y  Y2  3  0.0000  0.0000  0.0036  1.0
  Mg  Mg3  3  0.0000  0.0000  0.3749  1.0
  Se  Se4  9  0.0092  0.5046  0.7510  1.0
  Se  Se5  9  0.1781  0.3562  0.5808  1.0
  Se  Se6  3  0.0000  0.0000  0.2466  1.0
  Se  Se7  3  0.0000  0.0000  0.7583  1.0
]