data_[Na2Cu2Sn2Te6]
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
  Sn  1.9600  1.4500  0.8300
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [9.3739]
_cell_length_b [4.2376]
_cell_length_c [9.3795]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.7682]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaCuSnTe3]
_chemical_formula_sum '[Na2 Cu2 Sn2 Te6]'
_cell_volume [360.2707]
_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  0.2320  0.2500  0.1807  1.0
  Cu  Cu1  2  0.4356  0.7500  0.9339  1.0
  Sn  Sn2  2  0.1503  0.2500  0.6679  1.0
  Te  Te3  2  0.1396  0.7500  0.8904  1.0
  Te  Te4  2  0.1740  0.7500  0.4415  1.0
  Te  Te5  2  0.4790  0.2500  0.7787  1.0
]