data_HfBe2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.14
_cell_length_b   4.14
_cell_length_c   3.75
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfBe2Pb
_chemical_formula_sum   'Hf1 Be2 Pb1'
_cell_volume   64.21
_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
  Hf  Hf2  1  0.0  0.0  0.0  1.0
  Be  Be0  1  0.07  0.0  0.87  1.0
  Be  Be1  1  0.0  0.07  0.87  1.0
  Pb  Pb3  1  0.07  0.07  0.0  1.0

data_HfBe2Pb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.85
_cell_length_b   5.85
_cell_length_c   3.75
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfBe2Pb
_chemical_formula_sum   'Hf2 Be4 Pb2'
_cell_volume   128.42
_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
  Hf  Hf0  2  0.0  0.0  0.0  1.0
  Be  Be1  4  0.03  0.03  0.87  1.0
  Pb  Pb2  2  0.07  0.0  0.0  1.0

Hf Be Be Pb
Be2HfPb is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Be2HfPb clusters. Be(1) is bonded in a 3-coordinate geometry to one Be(1), one Hf(1), and one Pb(1) atom. The Be(1)-Be(1) bond length is 0.40 Å. The Be(1)-Hf(1) bond length is 0.55 Å. The Be(1)-Pb(1) bond length is 0.55 Å. Hf(1) is bonded in a distorted single-bond geometry to two equivalent Be(1) and one Pb(1) atom. The Hf(1)-Pb(1) bond length is 0.40 Å. Pb(1) is bonded in a distorted single-bond geometry to two equivalent Be(1) and one Hf(1) atom.