data_[K4Nb2Cu4Te8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Nb  1.6000  1.4500  0.8200
  Cu  1.9000  1.3500  0.8200
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.5531]
_cell_length_b [4.1147]
_cell_length_c [8.4108]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.2877]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Nb(CuTe2)2]
_chemical_formula_sum '[K4 Nb2 Cu4 Te8]'
_cell_volume [508.0561]
_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  0.1341  0.0000  0.5647  1.0
  Nb  Nb1  2  0.0000  0.0000  0.0000  1.0
  Cu  Cu2  4  0.1894  0.5000  0.9862  1.0
  Te  Te3  4  0.0195  0.5000  0.7743  1.0
  Te  Te4  4  0.1928  0.0000  0.1841  1.0
]