data_[Be6Cr3Pb6O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  Cr  1.6600  1.4000  0.9400
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.3655]
_cell_length_b [5.3655]
_cell_length_c [15.6386]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Be2Cr(PbO3)2]
_chemical_formula_sum '[Be6 Cr3 Pb6 O18]'
_cell_volume [389.8918]
_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
[
  Be  Be0  6  0.0000  0.0000  0.4093  1
  Cr  Cr1  3  0.0000  0.0000  0.0000  1
  Pb  Pb2  6  0.0000  0.0000  0.2129  1
  O  O3  18  0.0003  0.5001  0.2548  1
]