data_[Sm2U2Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  U  1.3800  1.7500  0.9913
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [5.3953]
_cell_length_b [5.3953]
_cell_length_c [6.8008]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [SmUAg2]
_chemical_formula_sum '[Sm2 U2 Ag4]'
_cell_volume [197.9695]
_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
[
  Sm  Sm0  2  0.0000  0.0000  0.5000  1
  U  U1  2  0.0000  0.0000  0.0000  1
  Ag  Ag2  4  0.0000  0.5000  0.2500  1
]