data_[Ac8Cr6O20]
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 [I4/mmm]
_cell_length_a [4.0024]
_cell_length_b [4.0024]
_cell_length_c [29.3902]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ac4Cr3O10]
_chemical_formula_sum '[Ac8 Cr6 O20]'
_cell_volume [470.8002]
_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
[
  Ac  Ac0  4  0.0000  0.0000  0.3010  1
  Ac  Ac1  4  0.0000  0.0000  0.4334  1
  Cr  Cr2  4  0.0000  0.0000  0.1388  1
  Cr  Cr3  2  0.0000  0.0000  0.0000  1
  O  O4  8  0.0000  0.5000  0.1404  1
  O  O5  4  0.0000  0.0000  0.0700  1
  O  O6  4  0.0000  0.0000  0.2160  1
  O  O7  4  0.0000  0.5000  0.0000  1
]