data_[Rb4Er4Br16]
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
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [17.1198]
_cell_length_b [7.0224]
_cell_length_c [7.7929]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.4082]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbErBr4]
_chemical_formula_sum '[Rb4 Er4 Br16]'
_cell_volume [903.2051]
_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  0.0000  0.2072  0.2500  1.0
  Er  Er1  4  0.2500  0.2500  0.0000  1.0
  Br  Br2  8  0.0979  0.3811  0.9481  1.0
  Br  Br3  8  0.1960  0.0709  0.6618  1.0
]