data_[Ca6Al3Cu18Ni3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Al  1.6100  1.2500  0.6750
  Cu  1.9000  1.3500  0.8200
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.2805]
_cell_length_b [6.2805]
_cell_length_c [15.8528]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Ca2AlCu6Ni]
_chemical_formula_sum '[Ca6 Al3 Cu18 Ni3]'
_cell_volume [541.5355]
_cell_formula_units_Z [3]
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  6  0.0000  0.0000  0.2104  1
  Al  Al1  3  -0.0000  0.0000  0.0000  1
  Cu  Cu2  18  0.0729  0.5262  0.2862  1
  Ni  Ni3  3  0.0000  0.0000  0.5000  1
]