data_[Sm6Mg18Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.9426]
_cell_length_b [11.2188]
_cell_length_c [12.4317]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Sm3Mg9Ag2]
_chemical_formula_sum '[Sm6 Mg18 Ag4]'
_cell_volume [689.3411]
_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  4  0.0000  0.0000  0.2877  1
  Sm  Sm1  2  0.0000  0.0000  0.0000  1
  Mg  Mg2  8  0.0000  0.2776  0.1364  1
  Mg  Mg3  8  0.0000  0.3670  0.3668  1
  Mg  Mg4  2  0.0000  0.5000  0.0000  1
  Ag  Ag5  4  0.0000  0.1577  0.5000  1
]