data_[Rb12Nd9Er3Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Nd  1.1400  1.8500  1.2765
  Er  1.2400  1.7500  1.0300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [8.6729]
_cell_length_b [8.6729]
_cell_length_c [24.0660]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Rb4Nd3ErSe8]
_chemical_formula_sum '[Rb12 Nd9 Er3 Se24]'
_cell_volume [1567.7165]
_cell_formula_units_Z [3]
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  9  0.0000  0.5000  0.5000  1
  Rb  Rb1  3  -0.0000  -0.0000  0.5000  1
  Nd  Nd2  9  0.0000  0.5000  0.0000  1
  Er  Er3  3  -0.0000  -0.0000  0.0000  1
  Se  Se4  18  0.0092  0.5046  0.7327  1
  Se  Se5  6  0.0000  0.0000  0.2659  1
]