data_[Na2Ag2Sn2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.6882]
_cell_length_b [4.0771]
_cell_length_c [10.6580]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.4028]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaAgSnSe3]
_chemical_formula_sum '[Na2 Ag2 Sn2 Se6]'
_cell_volume [322.0831]
_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  0.3541  0.7500  0.3303  1
  Ag  Ag1  2  0.3766  0.2500  0.9491  1
  Sn  Sn2  2  0.1239  0.7500  0.6710  1
  Se  Se3  2  0.0349  0.2500  0.8142  1
  Se  Se4  2  0.2089  0.2500  0.5026  1
  Se  Se5  2  0.4770  0.7500  0.7941  1
]