data_[Be16Si4Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [F-43m]
_cell_length_a [6.3584]
_cell_length_b [6.3584]
_cell_length_c [6.3584]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [216]
_chemical_formula_structural [Be4SiAg]
_chemical_formula_sum '[Be16 Si4 Ag4]'
_cell_volume [257.0611]
_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
[
  Be  Be0  16  0.1242  0.1242  0.3758  1
  Si  Si1  4  0.2500  0.2500  0.7500  1
  Ag  Ag2  4  0.0000  0.0000  0.0000  1
]