data_[Y2Be18Nb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Y  1.2200  1.8000  1.0400
  Be  1.5700  1.0500  0.5900
  Nb  1.6000  1.4500  0.8200
]
_symmetry_space_group_name_H-M [P6_3/mmc]
_cell_length_a [4.6877]
_cell_length_b [4.6877]
_cell_length_c [14.5820]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [194]
_chemical_formula_structural [YBe9Nb2]
_chemical_formula_sum '[Y2 Be18 Nb4]'
_cell_volume [277.5049]
_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
[
  Y  Y0  2  0.3333  0.6667  0.7500  1
  Be  Be1  12  0.1697  0.3394  0.1232  1
  Be  Be2  2  0.0000  0.0000  0.0000  1
  Be  Be3  2  0.0000  0.0000  0.2500  1
  Be  Be4  2  0.3333  0.6667  0.2500  1
  Nb  Nb5  4  0.3333  0.6667  0.5339  1
]