data_BeBiPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   4.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeBiPb2
_chemical_formula_sum   'Be1 Bi1 Pb2'
_cell_volume   110.46
_cell_formula_units_Z   1
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  1  0.0  0.0  0.0  1.0
  Bi  Bi1  1  0.4  0.4  0.0  1.0
  Pb  Pb2  1  0.4  0.0  0.41  1.0
  Pb  Pb3  1  0.0  0.4  0.41  1.0

data_BeBiPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.78
_cell_length_b   6.78
_cell_length_c   4.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeBiPb2
_chemical_formula_sum   'Be2 Bi2 Pb4'
_cell_volume   220.92
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.0  1.0
  Bi  Bi1  2  0.4  0.0  0.0  1.0
  Pb  Pb2  4  0.2  0.2  0.41  1.0

Be Bi Pb Pb
BePb2Bi crystallizes in the monoclinic Cm space group. Be(1) is bonded in a 3-coordinate geometry to two equivalent Pb(1) and one Bi(1) atom. Both Be(1)-Pb(1) bond lengths are 2.72 Å. The Be(1)-Bi(1) bond length is 2.68 Å. Pb(1) is bonded in a 2-coordinate geometry to one Be(1) and three equivalent Bi(1) atoms. There are a spread of Pb(1)-Bi(1) bond distances ranging from 2.72-3.49 Å. Bi(1) is bonded in a 7-coordinate geometry to one Be(1) and six equivalent Pb(1) atoms.