data_[Er8Cu4Si8]
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 [10.2870]
_cell_length_b [4.1769]
_cell_length_c [9.9769]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.2410]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Er2CuSi2]
_chemical_formula_sum '[Er8 Cu4 Si8]'
_cell_volume [377.6597]
_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  4  0.0080  0.0000  0.3268  1.0
  Er  Er1  4  0.1879  0.0000  0.1007  1.0
  Si  Si2  4  0.0167  0.5000  0.8851  1.0
  Si  Si3  4  0.1399  0.5000  0.5655  1.0
  Cu  Cu4  4  0.2252  0.5000  0.3560  1.0
]