data_[V18W21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  V  1.6300  1.3500  0.7775
  W  2.3600  1.3500  0.7667
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.2147]
_cell_length_b [5.2147]
_cell_length_c [26.5607]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [V6W7]
_chemical_formula_sum '[V18 W21]'
_cell_volume [625.4982]
_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
[
  V  V0  6  0.0000  0.0000  0.1682  1
  V  V1  6  0.0000  0.0000  0.3536  1
  V  V2  6  0.0000  0.0000  0.4564  1
  W  W3  18  0.0035  0.5017  0.4130  1
  W  W4  3  0.0000  0.0000  0.0000  1
]