data_[Rb16Na4Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [11.5640]
_cell_length_b [17.2909]
_cell_length_c [8.1217]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.5075]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb4NaAg]
_chemical_formula_sum '[Rb16 Na4 Ag4]'
_cell_volume [1530.7357]
_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
[
  Rb  Rb0  8  0.1056  0.1671  0.5580  1.0
  Rb  Rb1  8  0.2216  0.4230  0.8650  1.0
  Na  Na2  4  0.0000  0.3749  0.2500  1.0
  Ag  Ag3  4  0.0000  0.0014  0.2500  1.0
]