data_[Sm4Mg2Bi4O16]
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
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [7.2739]
_cell_length_b [11.9481]
_cell_length_c [5.6195]
_cell_angle_alpha [90.0000]
_cell_angle_beta [128.4616]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [Sm2Mg(BiO4)2]
_chemical_formula_sum '[Sm4 Mg2 Bi4 O16]'
_cell_volume [382.4154]
_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  0.1322  0.0000  1
  Sm  Sm1  2  0.0000  0.9041  0.5000  1
  Mg  Mg2  2  0.0000  0.6633  0.5000  1
  Bi  Bi3  2  0.0000  0.3696  0.5000  1
  Bi  Bi4  2  0.0000  0.5739  0.0000  1
  O  O5  4  0.1795  0.6969  0.9514  1
  O  O6  4  0.2198  0.5389  0.4960  1
  O  O7  4  0.2241  0.2759  0.3967  1
  O  O8  4  0.2472  0.9695  0.9910  1
]