data_[Rb4Na2Mg2I12]
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
  Mg  1.3100  1.5000  0.8600
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.0858]
_cell_length_b [7.4034]
_cell_length_c [9.3700]
_cell_angle_alpha [90.0000]
_cell_angle_beta [126.8684]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2NaMgI6]
_chemical_formula_sum '[Rb4 Na2 Mg2 I12]'
_cell_volume [837.2257]
_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  4  0.2470  0.5000  0.7674  1.0
  Na  Na1  2  0.0000  0.5000  0.0000  1.0
  Mg  Mg2  2  0.0000  0.0000  0.5000  1.0
  I  I3  8  0.0536  0.2507  0.3210  1.0
  I  I4  4  0.2361  0.0000  0.8203  1.0
]