data_[K4Tb2Zn4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Tb  1.1000  1.7500  0.9815
  Zn  1.6500  1.3500  0.8800
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.1594]
_cell_length_b [4.0795]
_cell_length_c [8.1551]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.2075]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Tb(ZnSe2)2]
_chemical_formula_sum '[K4 Tb2 Zn4 Se8]'
_cell_volume [494.1021]
_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
[
  K  K0  4  0.1279  0.0000  0.5603  1
  Tb  Tb1  2  0.0000  0.0000  0.0000  1
  Zn  Zn2  4  0.1865  0.5000  0.0117  1
  Se  Se3  4  0.0304  0.5000  0.7761  1
  Se  Se4  4  0.1930  0.0000  0.2085  1
]