data_[Ca4Ac4Tl4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Ac  1.1000  1.9500  1.2600
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [9.6797]
_cell_length_b [10.4344]
_cell_length_c [5.3772]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [CaAcTl]
_chemical_formula_sum '[Ca4 Ac4 Tl4]'
_cell_volume [543.1126]
_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
[
  Ca  Ca0  4  0.1845  0.5000  0.0000  1
  Ac  Ac1  4  0.0000  0.1872  0.5000  1
  Tl  Tl2  2  0.0000  0.0000  0.0000  1
  Tl  Tl3  2  0.0000  0.5000  0.5000  1
]