data_[Nd8Sm4Hg6O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Sm  1.1700  1.8500  1.2290
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.9146]
_cell_length_b [4.9146]
_cell_length_c [24.0864]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Nd4Sm2Hg3O2]
_chemical_formula_sum '[Nd8 Sm4 Hg6 O4]'
_cell_volume [581.7604]
_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
[
  Nd  Nd0  8  0.0000  0.5000  0.0858  1
  Sm  Sm1  4  0.0000  0.0000  0.2983  1
  Hg  Hg2  4  0.0000  0.0000  0.1723  1
  Hg  Hg3  2  0.0000  0.0000  0.0000  1
  O  O4  4  0.0000  0.0000  0.3947  1
]