data_[Rb4Cr16Se24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cr  1.6600  1.4000  0.9400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.7922]
_cell_length_b [12.7448]
_cell_length_c [19.9072]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Rb(Cr2Se3)2]
_chemical_formula_sum '[Rb4 Cr16 Se24]'
_cell_volume [962.1373]
_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  0.3359  0.7500  1
  Cr  Cr1  8  0.0000  0.1364  0.0388  1
  Cr  Cr2  8  0.0000  0.4116  0.1287  1
  Se  Se3  8  0.0000  0.0354  0.1445  1
  Se  Se4  8  0.0000  0.2248  0.5776  1
  Se  Se5  4  0.0000  0.3693  0.2500  1
  Se  Se6  4  0.0000  0.5000  0.0000  1
]