data_[Na8Ca4Ag4F20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ca  1.0000  1.8000  1.1400
  Ag  1.9300  1.6000  1.0867
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [3.4333]
_cell_length_b [15.0675]
_cell_length_c [10.7167]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Na2CaAgF5]
_chemical_formula_sum '[Na8 Ca4 Ag4 F20]'
_cell_volume [554.3857]
_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
[
  Na  Na0  4  0.0000  0.0241  0.6127  1.0
  Na  Na1  4  0.0000  0.0986  0.3248  1.0
  Ca  Ca2  4  0.0000  0.2775  0.0654  1.0
  Ag  Ag3  4  0.0000  0.3911  0.3893  1.0
  F  F4  4  0.0000  0.1289  0.0826  1.0
  F  F5  4  0.0000  0.1777  0.6859  1.0
  F  F6  4  0.0000  0.2370  0.4229  1.0
  F  F7  4  0.0000  0.4185  0.9873  1.0
  F  F8  4  0.0000  0.4958  0.7531  1.0
]