data_[Rb3Ac6Np3O18]
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
  Np  1.3600  1.7500  1.0000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.3861]
_cell_length_b [6.3861]
_cell_length_c [16.6485]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [RbAc2NpO6]
_chemical_formula_sum '[Rb3 Ac6 Np3 O18]'
_cell_volume [588.0029]
_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  0.7867  1
  Ac  Ac1  3  0.0000  0.0000  0.0148  1
  Ac  Ac2  3  0.0000  0.0000  0.5304  1
  Np  Np3  3  0.0000  0.0000  0.3221  1
  O  O4  9  0.0315  0.3555  0.9285  1
  O  O5  9  0.1083  0.7148  0.0740  1
]