data_[Ca6Si8Ni8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Si  1.9000  1.1000  0.5400
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [I-43m]
_cell_length_a [7.1876]
_cell_length_b [7.1876]
_cell_length_c [7.1876]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [217]
_chemical_formula_structural [Ca3(SiNi)4]
_chemical_formula_sum '[Ca6 Si8 Ni8]'
_cell_volume [371.3274]
_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  6  0.0000  0.0000  0.5000  1.0
  Si  Si1  8  0.1865  0.1865  0.8135  1.0
  Ni  Ni2  8  0.1339  0.8661  0.8661  1.0
]