data_[Er2Al8Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Al  1.6100  1.2500  0.6750
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.3178]
_cell_length_b [6.5555]
_cell_length_c [5.1347]
_cell_angle_alpha [90.0000]
_cell_angle_beta [121.7835]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Er(Al2Ag)2]
_chemical_formula_sum '[Er2 Al8 Ag4]'
_cell_volume [266.6130]
_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  0.5000  1
  Al  Al1  8  0.1869  0.2039  0.2068  1
  Ag  Ag2  4  0.0592  0.5000  0.8029  1
]