data_[Mg8Al4Cu2Si7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Al  1.6100  1.2500  0.6750
  Cu  1.9000  1.3500  0.8200
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [Pm]
_cell_length_a [10.4137]
_cell_length_b [3.9797]
_cell_length_c [10.4686]
_cell_angle_alpha [90.0000]
_cell_angle_beta [119.4654]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [6]
_chemical_formula_structural [Mg8Al4Cu2Si7]
_chemical_formula_sum '[Mg8 Al4 Cu2 Si7]'
_cell_volume [377.7389]
_cell_formula_units_Z [1]
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
[
  Mg  Mg0  1  0.0007  0.5000  0.2027  1
  Mg  Mg1  1  0.1410  0.5000  0.6220  1
  Mg  Mg2  1  0.2021  0.5000  0.9957  1
  Mg  Mg3  1  0.2534  0.0000  0.2508  1
  Mg  Mg4  1  0.3802  0.5000  0.5189  1
  Mg  Mg5  1  0.4763  0.5000  0.8591  1
  Mg  Mg6  1  0.7502  0.0000  0.0010  1
  Mg  Mg7  1  0.7958  0.5000  0.8001  1
  Al  Al8  1  0.0018  0.0000  0.7539  1
  Al  Al9  1  0.4954  0.0000  0.1363  1
  Al  Al10  1  0.6306  0.0000  0.4884  1
  Al  Al11  1  0.8492  0.0000  0.3432  1
  Si  Si12  1  0.0044  0.0000  0.9970  1
  Si  Si13  1  0.1248  0.0000  0.4212  1
  Si  Si14  1  0.2830  0.0000  0.8628  1
  Cu  Cu15  1  0.3320  0.0000  0.6641  1
  Si  Si16  1  0.4371  0.5000  0.2883  1
  Si  Si17  1  0.5770  0.0000  0.7054  1
  Cu  Cu18  1  0.6862  0.5000  0.3544  1
  Si  Si19  1  0.7041  0.5000  0.1410  1
  Si  Si20  1  0.8749  0.5000  0.5937  1
]