data_[Rb2Ca2Ag2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  Ag  1.9300  1.6000  1.0867
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.5527]
_cell_length_b [8.3270]
_cell_length_c [9.9860]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.9664]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbCaAgI4]
_chemical_formula_sum '[Rb2 Ca2 Ag2 I8]'
_cell_volume [593.9386]
_cell_formula_units_Z [2]
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  2  0.2138  0.2500  0.0427  1.0
  Ca  Ca1  2  0.2174  0.2500  0.5573  1.0
  Ag  Ag2  2  0.2253  0.7500  0.3296  1.0
  I  I3  4  0.0321  0.5112  0.7089  1.0
  I  I4  2  0.4435  0.7500  0.1489  1.0
  I  I5  2  0.4949  0.7500  0.5999  1.0
]