data_[Ca6Ni18P18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Ni  1.9100  1.3500  0.7400
  P  2.1900  1.0000  0.5500
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.4426]
_cell_length_b [6.4426]
_cell_length_c [19.9654]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Ca(NiP)3]
_chemical_formula_sum '[Ca6 Ni18 P18]'
_cell_volume [717.6792]
_cell_formula_units_Z [6]
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  0.3330  1
  Ni  Ni1  18  0.0001  0.6632  0.8738  1
  P  P2  18  0.0007  0.6753  0.0963  1
]