data_[Sr18Ca2Ac8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ca  1.0000  1.8000  1.1400
  Ac  1.1000  1.9500  1.2600
]
_symmetry_space_group_name_H-M [P6_3/mmc]
_cell_length_a [11.6891]
_cell_length_b [11.6891]
_cell_length_c [12.7479]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [194]
_chemical_formula_structural [Sr9CaAc4]
_chemical_formula_sum '[Sr18 Ca2 Ac8]'
_cell_volume [1508.4424]
_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
[
  Sr  Sr0  12  0.2017  0.4035  0.0395  1
  Sr  Sr1  6  0.0779  0.5390  0.7500  1
  Ca  Ca2  2  0.3333  0.6667  0.2500  1
  Ac  Ac3  6  0.1040  0.2080  0.7500  1
  Ac  Ac4  2  0.0000  0.0000  0.0000  1
]