data_[Rb2Na2Mg2I8]
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 [P2_1/m]
_cell_length_a [7.8662]
_cell_length_b [8.3606]
_cell_length_c [9.8903]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.7050]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaMgI4]
_chemical_formula_sum '[Rb2 Na2 Mg2 I8]'
_cell_volume [622.9961]
_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  0.2297  0.2500  0.0542  1.0
  Na  Na1  2  0.2275  0.2500  0.5646  1.0
  Mg  Mg2  2  0.2339  0.7500  0.3261  1.0
  I  I3  4  0.0040  0.5008  0.7220  1.0
  I  I4  2  0.4245  0.7500  0.1345  1.0
  I  I5  2  0.4676  0.7500  0.5885  1.0
]