data_[Ca2Ag2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [C2/m]
_cell_length_a [16.5092]
_cell_length_b [4.4225]
_cell_length_c [7.4290]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.2846]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [CaAgI4]
_chemical_formula_sum '[Ca2 Ag2 I8]'
_cell_volume [486.3277]
_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
[
  Ca  Ca0  2  0.0000  0.5000  0.5000  1.0
  Ag  Ag1  2  0.0000  0.0000  0.0000  1.0
  I  I2  4  0.1174  0.0000  0.8010  1.0
  I  I3  4  0.1194  0.5000  0.2755  1.0
]