data_[Li6Ni18As18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Ni  1.9100  1.3500  0.7400
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.6137]
_cell_length_b [6.6137]
_cell_length_c [18.9392]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Li(NiAs)3]
_chemical_formula_sum '[Li6 Ni18 As18]'
_cell_volume [717.4245]
_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
[
  Li  Li0  6  0.0000  0.0000  0.3328  1
  Ni  Ni1  18  0.0004  0.6588  0.8754  1
  As  As2  18  0.0007  0.6786  0.0865  1
]