data_[Mg6Ag3I3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
  I  2.6600  1.4000  1.2733
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.3726]
_cell_length_b [5.3726]
_cell_length_c [14.7235]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Mg2AgIO6]
_chemical_formula_sum '[Mg6 Ag3 I3 O18]'
_cell_volume [368.0520]
_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
[
  Mg  Mg0  3  0.0000  0.0000  0.0088  1.0
  Mg  Mg1  3  0.0000  0.0000  0.5262  1.0
  Ag  Ag2  3  0.0000  0.0000  0.7940  1.0
  I  I3  3  0.0000  0.0000  0.3267  1.0
  O  O4  9  0.0281  0.3596  0.9258  1.0
  O  O5  9  0.0857  0.7181  0.0765  1.0
]