data_[Ac24Si4N16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Si  1.9000  1.1000  0.5400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.9975]
_cell_length_b [13.0787]
_cell_length_c [20.4879]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Ac6SiN4]
_chemical_formula_sum '[Ac24 Si4 N16]'
_cell_volume [1071.1667]
_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  8  0.0000  0.0450  0.1505  1
  Ac  Ac1  8  0.0000  0.2219  0.5788  1
  Ac  Ac2  4  0.0000  0.3504  0.2500  1
  Ac  Ac3  4  0.0000  0.5000  0.0000  1
  Si  Si4  4  0.0000  0.3328  0.7500  1
  N  N5  8  0.0000  0.1410  0.0394  1
  N  N6  8  0.0000  0.4174  0.1235  1
]