data_[Na2Ag10Se8]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.1607]
_cell_length_b [7.7308]
_cell_length_c [14.7975]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [NaAg5Se4]
_chemical_formula_sum '[Na2 Ag10 Se8]'
_cell_volume [475.9747]
_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  0.0000  0.5000  0.5000  1
  Ag  Ag1  8  0.0000  0.2232  0.1756  1
  Ag  Ag2  2  0.0000  0.0000  0.5000  1
  Se  Se3  4  0.0000  0.2881  0.0000  1
  Se  Se4  4  0.0000  0.5000  0.2861  1
]