data_[Er6Tm4Cu4]
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
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.3510]
_cell_length_b [3.5744]
_cell_length_c [8.9149]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.6435]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Er3(TmCu)2]
_chemical_formula_sum '[Er6 Tm4 Cu4]'
_cell_volume [351.7817]
_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
[
  Er  Er0  4  0.1141  0.5000  0.4433  1.0
  Er  Er1  2  0.0000  0.5000  0.0000  1.0
  Tm  Tm2  4  0.1550  0.0000  0.8135  1.0
  Cu  Cu3  4  0.1725  0.0000  0.2286  1.0
]