data_[Pm6Er2Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Er  1.2400  1.7500  1.0300
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [5.2141]
_cell_length_b [9.3481]
_cell_length_c [6.9642]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Pm3ErAg2]
_chemical_formula_sum '[Pm6 Er2 Ag4]'
_cell_volume [339.4479]
_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
[
  Pm  Pm0  2  0.0000  0.0610  0.4912  1
  Pm  Pm1  2  0.0000  0.3351  0.8392  1
  Pm  Pm2  2  0.5000  0.1714  0.1588  1
  Er  Er3  2  0.5000  0.4407  0.5108  1
  Ag  Ag4  2  0.0000  0.3492  0.2740  1
  Ag  Ag5  2  0.5000  0.1573  0.7259  1
]