data_[Rb1Na1Er2Cl8]
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
  Er  1.2400  1.7500  1.0300
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [6.7735]
_cell_length_b [8.2367]
_cell_length_c [6.9957]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.4241]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [RbNaEr2Cl8]
_chemical_formula_sum '[Rb1 Na1 Er2 Cl8]'
_cell_volume [389.1409]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.0000  1.0
  Na  Na1  1  0.0000  0.0000  0.0000  1.0
  Er  Er2  2  0.5000  0.2438  0.5000  1.0
  Cl  Cl3  4  0.2490  0.2242  0.2064  1.0
  Cl  Cl4  2  0.3029  0.0000  0.6546  1.0
  Cl  Cl5  2  0.3102  0.5000  0.6430  1.0
]