data_[Er12Tm8Mg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [17.0686]
_cell_length_b [6.9697]
_cell_length_c [6.1164]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.1657]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Er3Tm2Mg]
_chemical_formula_sum '[Er12 Tm8 Mg4]'
_cell_volume [708.4935]
_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
[
  Er  Er0  8  0.1677  0.1244  0.0268  1.0
  Er  Er1  4  0.0000  0.1277  0.2500  1.0
  Tm  Tm2  8  0.1658  0.3771  0.5348  1.0
  Mg  Mg3  4  0.0000  0.3733  0.7500  1.0
]