data_[Ag8Sb8Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ag  1.9300  1.6000  1.0867
  Sb  2.0500  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [17.3636]
_cell_length_b [7.8306]
_cell_length_c [7.1137]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Ag2Sb2Se5]
_chemical_formula_sum '[Ag8 Sb8 Se20]'
_cell_volume [967.2350]
_cell_formula_units_Z [4]
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
[
  Ag  Ag0  4  0.0000  0.0000  0.0328  1
  Ag  Ag1  4  0.2500  0.0803  0.9326  1
  Sb  Sb2  8  0.1108  0.5206  0.9469  1
  Se  Se3  8  0.0454  0.2441  0.7812  1
  Se  Se4  8  0.1429  0.6094  0.5918  1
  Se  Se5  4  0.2500  0.1001  0.5588  1
]