data_[Rb8Ac4Sb4S16]
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
  Sb  2.0500  1.4500  0.8300
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.6704]
_cell_length_b [8.9913]
_cell_length_c [12.4571]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [Rb2AcSbS4]
_chemical_formula_sum '[Rb8 Ac4 Sb4 S16]'
_cell_volume [971.1379]
_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  0.0000  0.5000  1
  Rb  Rb1  4  0.2500  0.2500  0.7500  1
  Ac  Ac2  4  0.0000  0.0000  0.0000  1
  Sb  Sb3  4  0.2500  0.2500  0.2500  1
  S  S4  8  0.0000  0.0401  0.2393  1
  S  S5  8  0.2258  0.7500  0.9779  1
]