data_[Er10Mg2Ag12]
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
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.0192]
_cell_length_b [7.1721]
_cell_length_c [15.1354]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Er5MgAg6]
_chemical_formula_sum '[Er10 Mg2 Ag12]'
_cell_volume [544.8438]
_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  4  0.0000  0.0000  0.3324  1
  Er  Er1  4  0.0000  0.5000  0.3338  1
  Er  Er2  2  0.0000  0.5000  0.0000  1
  Mg  Mg3  2  0.0000  0.0000  0.0000  1
  Ag  Ag4  8  0.0000  0.2476  0.1644  1
  Ag  Ag5  4  0.0000  0.2536  0.5000  1
]