data_[Rb4Er4Ir2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Er  1.2400  1.7500  1.0300
  Ir  2.2000  1.3500  0.7650
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.7790]
_cell_length_b [9.9119]
_cell_length_c [6.8663]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.0510]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Er2IrO6]
_chemical_formula_sum '[Rb4 Er4 Ir2 O12]'
_cell_volume [379.8187]
_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  0.0000  0.1640  0.0000  1
  Er  Er1  4  0.0000  0.3352  0.5000  1
  Ir  Ir2  2  0.0000  0.0000  0.5000  1
  O  O3  8  0.2055  0.1569  0.6640  1
  O  O4  4  0.2426  0.5000  0.6666  1
]