data_[Ac8Cr4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Cr  1.6600  1.4000  0.9400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [11.3197]
_cell_length_b [4.1401]
_cell_length_c [11.4402]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Ac2CrO5]
_chemical_formula_sum '[Ac8 Cr4 O20]'
_cell_volume [536.1396]
_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
[
  Ac  Ac0  4  0.0851  0.2500  0.2119  1
  Ac  Ac1  4  0.1389  0.2500  0.5596  1
  Cr  Cr2  4  0.2007  0.2500  0.8660  1
  O  O3  4  0.0121  0.7500  0.5997  1
  O  O4  4  0.0513  0.2500  0.8181  1
  O  O5  4  0.2064  0.7500  0.2334  1
  O  O6  4  0.2250  0.2500  0.0248  1
  O  O7  4  0.2377  0.7500  0.8688  1
]