data_[Ho6Er6Mg2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ho  1.2300  1.7500  1.0410
  Er  1.2400  1.7500  1.0300
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [P6_3/m]
_cell_length_a [9.3341]
_cell_length_b [9.3341]
_cell_length_c [5.5628]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [176]
_chemical_formula_structural [Ho3Er3Mg]
_chemical_formula_sum '[Ho6 Er6 Mg2]'
_cell_volume [419.7309]
_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  6  0.0560  0.2409  0.2500  1.0
  Er  Er1  6  0.1022  0.4773  0.7500  1.0
  Mg  Mg2  2  0.3333  0.6667  0.2500  1.0
]