data_[Si3Ag18F36]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [10.1655]
_cell_length_b [10.1655]
_cell_length_c [9.7749]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [SiAg6F12]
_chemical_formula_sum '[Si3 Ag18 F36]'
_cell_volume [874.7802]
_cell_formula_units_Z [3]
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
[
  Si  Si0  3  0.0000  0.0000  0.0000  1.0
  Ag  Ag1  18  0.0424  0.7951  0.6545  1.0
  F  F2  18  0.0212  0.7889  0.3973  1.0
  F  F3  18  0.0517  0.8938  0.8993  1.0
]