data_[Rb4Ac2Mn4Se8]
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
  Mn  1.5500  1.4000  0.6483
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.3253]
_cell_length_b [4.3733]
_cell_length_c [8.3859]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.8286]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Ac(MnSe2)2]
_chemical_formula_sum '[Rb4 Ac2 Mn4 Se8]'
_cell_volume [559.5847]
_cell_formula_units_Z [2]
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  0.1312  0.0000  0.5563  1
  Ac  Ac1  2  0.0000  0.0000  0.0000  1
  Mn  Mn2  4  0.1820  0.5000  0.9857  1
  Se  Se3  4  0.0281  0.5000  0.7613  1
  Se  Se4  4  0.2052  0.0000  0.1671  1
]