data_[Na2Cu2Sn2S6]
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
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.3227]
_cell_length_b [3.8422]
_cell_length_c [9.9451]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.9148]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaCuSnS3]
_chemical_formula_sum '[Na2 Cu2 Sn2 S6]'
_cell_volume [266.2437]
_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  0.3286  0.2500  0.3041  1.0
  Cu  Cu1  2  0.4038  0.7500  0.9357  1.0
  Sn  Sn2  2  0.1406  0.2500  0.6719  1.0
  S  S3  2  0.0749  0.7500  0.8237  1.0
  S  S4  2  0.2113  0.7500  0.4990  1.0
  S  S5  2  0.4944  0.2500  0.8205  1.0
]