data_[Na4Y6Ag2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Y  1.2200  1.8000  1.0400
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.1782]
_cell_length_b [12.4355]
_cell_length_c [7.2704]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.1830]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Y3AgSe6]
_chemical_formula_sum '[Na4 Y6 Ag2 Se12]'
_cell_volume [612.9509]
_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  4  0.0000  0.3332  0.0000  1.0
  Y  Y1  4  0.0000  0.1662  0.5000  1.0
  Y  Y2  2  0.0000  0.5000  0.5000  1.0
  Ag  Ag3  2  0.0000  0.0000  0.0000  1.0
  Se  Se4  8  0.2458  0.3344  0.7345  1.0
  Se  Se5  4  0.2427  0.0000  0.7351  1.0
]