data_[Ho4Er4Cu4]
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
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.5597]
_cell_length_b [6.9234]
_cell_length_c [6.7158]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.8585]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [HoErCu]
_chemical_formula_sum '[Ho4 Er4 Cu4]'
_cell_volume [304.9662]
_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
[
  Ho  Ho0  4  0.0645  0.7486  0.0009  1
  Er  Er1  4  0.3949  0.0954  0.2500  1
  Cu  Cu2  4  0.2108  0.0393  0.7550  1
]