data_[Na2Cu2Sn2Te4]
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/c]
_cell_length_a [7.7709]
_cell_length_b [4.9832]
_cell_length_c [8.3724]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.0747]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [NaCuSnTe2]
_chemical_formula_sum '[Na2 Cu2 Sn2 Te4]'
_cell_volume [302.5247]
_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  0.5000  0.2277  0.2500  1.0
  Cu  Cu1  2  0.0000  0.0000  0.0000  1.0
  Sn  Sn2  2  0.0000  0.3567  0.7500  1.0
  Te  Te3  4  0.2668  0.2772  0.5035  1.0
]