data_[Sm16Sn16O56]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Fd-3m]
_cell_length_a [10.5339]
_cell_length_b [10.5339]
_cell_length_c [10.5339]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [227]
_chemical_formula_structural [Sm2Sn2O7]
_chemical_formula_sum '[Sm16 Sn16 O56]'
_cell_volume [1168.8683]
_cell_formula_units_Z [8]
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  16  0.1250  0.1250  0.6250  1
  Sn  Sn1  16  0.1250  0.1250  0.1250  1
  O  O2  48  0.0000  0.0000  0.2114  1
  O  O3  8  0.0000  0.0000  0.5000  1
]