data_[Ca2Ac8Pm8]
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
  Pm  1.1300  1.8500  1.1100
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [11.4548]
_cell_length_b [11.4548]
_cell_length_c [5.4447]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ca(AcPm)4]
_chemical_formula_sum '[Ca2 Ac8 Pm8]'
_cell_volume [714.4205]
_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
[
  Ca  Ca0  2  0.0000  0.0000  0.0000  1
  Ac  Ac1  8  0.1704  0.1704  0.5000  1
  Pm  Pm2  8  0.0000  0.3431  0.0000  1
]