data_[Ac4Fe4S4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Fe  1.8300  1.4000  0.8525
  S  2.5800  1.0000  0.8800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [5.5116]
_cell_length_b [12.7210]
_cell_length_c [5.4125]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [AcFeSO2]
_chemical_formula_sum '[Ac4 Fe4 S4 O8]'
_cell_volume [379.4842]
_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  0.0000  0.3572  0.7500  1
  Fe  Fe1  4  0.0000  0.0164  0.7500  1
  S  S2  4  0.0000  0.2481  0.2500  1
  O  O3  8  0.2336  0.0000  0.0000  1
]