data_[Rb4Eu4Er4Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Eu  1.2000  1.8500  1.1985
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.0087]
_cell_length_b [4.1657]
_cell_length_c [12.1250]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.0434]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbEuErSe3]
_chemical_formula_sum '[Rb4 Eu4 Er4 Se12]'
_cell_volume [822.5959]
_cell_formula_units_Z [4]
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  0.0540  0.5000  0.2585  1
  Eu  Eu1  4  0.1132  0.0000  0.6826  1
  Er  Er2  4  0.1671  0.0000  0.0668  1
  Se  Se3  4  0.1553  0.5000  0.8872  1
  Se  Se4  4  0.2184  0.5000  0.2470  1
  Se  Se5  2  0.0000  0.0000  0.0000  1
  Se  Se6  2  0.0000  0.5000  0.5000  1
]