data_[Sm4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.6765]
_cell_length_b [3.9750]
_cell_length_c [6.4468]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.8389]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [SmO2]
_chemical_formula_sum '[Sm4 O8]'
_cell_volume [169.4926]
_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
[
  Sm  Sm0  4  0.1968  0.5000  0.7300  1.0
  O  O1  4  0.0816  0.0000  0.9299  1.0
  O  O2  4  0.1515  0.5000  0.3579  1.0
]