data_[Ni3Ag3Sn18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ni  1.9100  1.3500  0.7400
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.5724]
_cell_length_b [6.5724]
_cell_length_c [16.0792]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [NiAgSn6]
_chemical_formula_sum '[Ni3 Ag3 Sn18]'
_cell_volume [601.5103]
_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
[
  Ni  Ni0  3  0.0000  0.0000  0.0000  1.0
  Ag  Ag1  3  -0.0000  0.0000  0.5000  1.0
  Sn  Sn2  18  0.0332  0.6302  0.4143  1.0
]