data_[Na6Ag3As3Cl18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  As  2.1800  1.1500  0.6600
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.9083]
_cell_length_b [6.9083]
_cell_length_c [18.3169]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Na2AgAsCl6]
_chemical_formula_sum '[Na6 Ag3 As3 Cl18]'
_cell_volume [757.0461]
_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  0.4734  1.0
  Na  Na1  3  0.0000  0.0000  0.9833  1.0
  Ag  Ag2  3  0.0000  0.0000  0.1835  1.0
  As  As3  3  0.0000  0.0000  0.6744  1.0
  Cl  Cl4  9  0.0075  0.3842  0.4172  1.0
  Cl  Cl5  9  0.0534  0.6889  0.2562  1.0
]