data_[Er4Si2Sn2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Si  1.9000  1.1000  0.5400
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.0201]
_cell_length_b [4.3714]
_cell_length_c [10.9266]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Er2SiSn]
_chemical_formula_sum '[Er4 Si2 Sn2]'
_cell_volume [192.0173]
_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  2  0.0000  0.0000  0.3561  1
  Er  Er1  2  0.5000  0.0000  0.6350  1
  Si  Si2  2  0.0000  0.0000  0.0918  1
  Sn  Sn3  2  0.5000  0.0000  0.9171  1
]