data_[Er4Mg4Al4S16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Mg  1.3100  1.5000  0.8600
  Al  1.6100  1.2500  0.6750
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [7.5072]
_cell_length_b [7.5432]
_cell_length_c [10.6230]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [ErMgAlS4]
_chemical_formula_sum '[Er4 Mg4 Al4 S16]'
_cell_volume [601.5667]
_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  0.0000  0.0000  0.0000  1.0
  Mg  Mg1  4  0.2500  0.2500  0.7500  1.0
  Al  Al2  4  0.0000  0.2500  0.3695  1.0
  S  S3  8  0.0000  0.0070  0.7467  1.0
  S  S4  8  0.2448  0.2500  0.5018  1.0
]