data_[Sm3Hg6Te3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Hg  2.0000  1.5000  1.2450
  Te  2.1000  1.4000  1.2933
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [5.8285]
_cell_length_b [5.8285]
_cell_length_c [14.9890]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [SmHg2TeO6]
_chemical_formula_sum '[Sm3 Hg6 Te3 O18]'
_cell_volume [440.9743]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.0000  1
  Hg  Hg1  6  0.0000  0.0000  0.2477  1
  Te  Te2  3  0.0000  -0.0000  0.5000  1
  O  O3  18  0.0307  0.4102  0.2437  1
]