data_[Na3Sm3Ag6F18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sm  1.1700  1.8500  1.2290
  Ag  1.9300  1.6000  1.0867
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.0841]
_cell_length_b [6.0841]
_cell_length_c [15.5434]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaSmAg2F6]
_chemical_formula_sum '[Na3 Sm3 Ag6 F18]'
_cell_volume [498.2781]
_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
[
  Na  Na0  3  0.0000  0.0000  0.0014  1.0
  Sm  Sm1  3  0.0000  0.0000  0.5011  1.0
  Ag  Ag2  3  0.0000  0.0000  0.2273  1.0
  Ag  Ag3  3  0.0000  0.0000  0.7228  1.0
  F  F4  9  0.0106  0.3840  0.7632  1.0
  F  F5  9  0.0272  0.6331  0.2604  1.0
]