data_[Sm4Mg2Cu8O16]
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
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4]
_cell_length_a [5.7392]
_cell_length_b [5.7392]
_cell_length_c [11.4800]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [Sm2Mg(CuO2)4]
_chemical_formula_sum '[Sm4 Mg2 Cu8 O16]'
_cell_volume [378.1305]
_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  0.0000  1
  Sm  Sm1  2  0.0000  0.5000  0.7500  1
  Mg  Mg2  2  0.0000  0.0000  0.5000  1
  Cu  Cu3  8  0.0245  0.2768  0.3367  1
  O  O4  8  0.1638  0.2093  0.1848  1
  O  O5  8  0.1707  0.7247  0.5763  1
]