data_[Pm8Ni4Ag8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ni  1.9100  1.3500  0.7400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.6229]
_cell_length_b [3.9391]
_cell_length_c [11.7008]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.0128]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm2NiAg2]
_chemical_formula_sum '[Pm8 Ni4 Ag8]'
_cell_volume [460.0545]
_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  0.0013  0.0000  0.3371  1
  Pm  Pm1  4  0.1899  0.0000  0.1267  1
  Ni  Ni2  4  0.1956  0.5000  0.3082  1
  Ag  Ag3  4  0.0347  0.5000  0.8900  1
  Ag  Ag4  4  0.1670  0.5000  0.5482  1
]