data_[Er4Cu6Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.0798]
_cell_length_b [3.9991]
_cell_length_c [6.3983]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.1417]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Er2Cu3Si2]
_chemical_formula_sum '[Er4 Cu6 Si4]'
_cell_volume [235.3564]
_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  0.1487  0.0000  0.7612  1.0
  Cu  Cu1  4  0.1064  0.5000  0.4259  1.0
  Si  Si2  4  0.1391  0.0000  0.2281  1.0
  Cu  Cu3  2  0.0000  0.5000  0.0000  1.0
]