data_[Rb3Ac6U3Se18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ac  1.1000  1.9500  1.2600
  U  1.3800  1.7500  0.9913
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.7942]
_cell_length_b [7.7942]
_cell_length_c [20.7243]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [RbAc2USe6]
_chemical_formula_sum '[Rb3 Ac6 U3 Se18]'
_cell_volume [1090.3106]
_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  3  0.0000  0.0000  0.2083  1
  Ac  Ac1  3  0.0000  0.0000  0.4736  1
  Ac  Ac2  3  0.0000  0.0000  0.9956  1
  U  U3  3  0.0000  0.0000  0.6717  1
  Se  Se4  9  0.0172  0.3113  0.7443  1
  Se  Se5  9  0.0385  0.6107  0.2521  1
]