data_[Cs2Ac2Ni2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Ac  1.1000  1.9500  1.2600
  Ni  1.9100  1.3500  0.7400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.1540]
_cell_length_b [5.8318]
_cell_length_c [8.2511]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.8375]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [CsAcNiO4]
_chemical_formula_sum '[Cs2 Ac2 Ni2 O8]'
_cell_volume [284.8852]
_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
[
  Cs  Cs0  2  0.2839  0.2500  0.0674  1
  Ac  Ac1  2  0.2374  0.2500  0.5522  1
  Ni  Ni2  2  0.2212  0.7500  0.3233  1
  O  O3  4  0.0297  0.5123  0.3152  1
  O  O4  2  0.4067  0.7500  0.5409  1
  O  O5  2  0.4172  0.7500  0.1992  1
]