data_[Zr2Nb4Al8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Zr  1.3300  1.5500  0.8600
  Nb  1.6000  1.4500  0.8200
  Al  1.6100  1.2500  0.6750
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [6.7511]
_cell_length_b [6.7511]
_cell_length_c [5.4538]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Zr(NbAl2)2]
_chemical_formula_sum '[Zr2 Nb4 Al8]'
_cell_volume [248.5700]
_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
[
  Zr  Zr0  2  0.0000  0.0000  0.0000  1.0
  Nb  Nb1  4  0.0000  0.5000  0.2500  1.0
  Al  Al2  8  0.1960  0.1960  0.5000  1.0
]