data_HfTaBePb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   4.74
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTaBePb
_chemical_formula_sum   'Hf1 Ta1 Be1 Pb1'
_cell_volume   75.17
_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  Hf1  1  0.02  0.02  0.02  1.0
  Ta  Ta3  1  0.67  0.67  0.67  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Pb  Pb2  1  0.35  0.35  0.35  1.0

data_HfTaBePb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   11.6
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   HfTaBePb
_chemical_formula_sum   'Hf3 Ta3 Be3 Pb3'
_cell_volume   225.51
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.98  1.0
  Ta  Ta1  3  0.0  0.0  0.33  1.0
  Be  Be2  3  0.0  0.0  0.0  1.0
  Pb  Pb3  3  0.0  0.0  0.65  1.0

Hf Ta Be Pb
BeHfTaPb crystallizes in the trigonal R3m space group. Be(1) is bonded in a single-bond geometry to one Hf(1) and three equivalent Pb(1) atoms. The Be(1)-Hf(1) bond length is 0.28 Å. All Be(1)-Pb(1) bond lengths are 2.74 Å. Hf(1) is bonded in a single-bond geometry to one Be(1) and four equivalent Pb(1) atoms. There are three shorter (2.74 Å) and one longer (3.77 Å) Hf(1)-Pb(1) bond length. Ta(1) is bonded in a distorted trigonal planar geometry to four equivalent Pb(1) atoms. There are three shorter (2.74 Å) and one longer (3.77 Å) Ta(1)-Pb(1) bond length. Pb(1) is bonded in a 11-coordinate geometry to three equivalent Be(1), four equivalent Hf(1), and four equivalent Ta(1) atoms.