data_[Mg3Mn6Pb3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Mn  1.5500  1.4000  0.6483
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.3190]
_cell_length_b [5.3190]
_cell_length_c [14.2297]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [MgMn2PbO6]
_chemical_formula_sum '[Mg3 Mn6 Pb3 O18]'
_cell_volume [348.6432]
_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
[
  Mg  Mg0  3  0.0000  0.0000  0.8117  1
  Mn  Mn1  3  0.0000  0.0000  0.0229  1
  Mn  Mn2  3  0.0000  0.0000  0.5096  1
  Pb  Pb3  3  0.0000  0.0000  0.3023  1
  O  O4  9  0.0456  0.6770  0.0896  1
  O  O5  9  0.0532  0.3444  0.5819  1
]