data_[Pm4Mg12Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [9.2761]
_cell_length_b [4.3787]
_cell_length_c [12.1133]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [PmMg3Ag]
_chemical_formula_sum '[Pm4 Mg12 Ag4]'
_cell_volume [492.0057]
_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
[
  Pm  Pm0  4  0.1675  0.2500  0.9928  1
  Mg  Mg1  4  0.0540  0.2500  0.5851  1
  Mg  Mg2  4  0.0976  0.7500  0.7737  1
  Mg  Mg3  4  0.1478  0.7500  0.2096  1
  Ag  Ag4  4  0.1357  0.2500  0.3668  1
]