data_[Zr8Cu4Si16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Zr  1.3300  1.5500  0.8600
  Cu  1.9000  1.3500  0.8200
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.7104]
_cell_length_b [32.9658]
_cell_length_c [3.6841]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Zr2CuSi4]
_chemical_formula_sum '[Zr8 Cu4 Si16]'
_cell_volume [450.6233]
_cell_formula_units_Z [4]
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  4  0.0000  0.0464  0.7500  1.0
  Zr  Zr1  4  0.0000  0.3237  0.7500  1.0
  Si  Si2  4  0.0000  0.1123  0.2500  1.0
  Si  Si3  4  0.0000  0.2033  0.7500  1.0
  Cu  Cu4  4  0.0000  0.2501  0.2500  1.0
  Si  Si5  4  0.0000  0.3881  0.2500  1.0
  Si  Si6  4  0.0000  0.4759  0.7500  1.0
]