data_[Er2Si2Ge2W8]
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
  Ge  2.0100  1.2500  0.7700
  W  2.3600  1.3500  0.7667
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.4157]
_cell_length_b [4.3600]
_cell_length_c [16.1590]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [ErSiGeW4]
_chemical_formula_sum '[Er2 Si2 Ge2 W8]'
_cell_volume [240.6483]
_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  0.9976  1
  Si  Si1  2  0.5000  0.0000  0.4241  1
  Ge  Ge2  2  0.5000  0.0000  0.5723  1
  W  W3  2  0.0000  0.0000  0.3131  1
  W  W4  2  0.0000  0.0000  0.6903  1
  W  W5  2  0.5000  0.0000  0.1761  1
  W  W6  2  0.5000  0.0000  0.8265  1
]