data_[Ho2Mg16Ni8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ho  1.2300  1.7500  1.0410
  Mg  1.3100  1.5000  0.8600
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [9.2246]
_cell_length_b [9.2246]
_cell_length_c [5.3866]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ho(Mg2Ni)4]
_chemical_formula_sum '[Ho2 Mg16 Ni8]'
_cell_volume [458.3561]
_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
[
  Ho  Ho0  2  0.0000  0.0000  0.0000  1
  Mg  Mg1  8  0.0000  0.2199  0.5000  1
  Mg  Mg2  8  0.0000  0.3356  0.0000  1
  Ni  Ni3  8  0.2500  0.2500  0.2500  1
]