data_[Na2Cu2Sb2Te6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cu  1.9000  1.3500  0.8200
  Sb  2.0500  1.4500  0.8300
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [9.2904]
_cell_length_b [4.1987]
_cell_length_c [9.5281]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.1372]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaCuSbTe3]
_chemical_formula_sum '[Na2 Cu2 Sb2 Te6]'
_cell_volume [360.4136]
_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
[
  Na  Na0  2  0.2323  0.2500  0.1783  1.0
  Cu  Cu1  2  0.4319  0.7500  0.9336  1.0
  Sb  Sb2  2  0.1423  0.2500  0.6625  1.0
  Te  Te3  2  0.1323  0.7500  0.8887  1.0
  Te  Te4  2  0.1901  0.7500  0.4451  1.0
  Te  Te5  2  0.4814  0.2500  0.7832  1.0
]