data_BeInHgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   5.16
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeInHgPb
_chemical_formula_sum   'Be1 In1 Hg1 Pb1'
_cell_volume   97.23
_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
  In  In2  1  0.82  0.82  0.82  1.0
  Hg  Hg1  1  0.47  0.47  0.47  1.0
  Pb  Pb3  1  0.65  0.65  0.65  1.0

data_BeInHgPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   12.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   BeInHgPb
_chemical_formula_sum   'Be3 In3 Hg3 Pb3'
_cell_volume   291.7
_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
  Be  Be0  3  0.0  0.0  0.0  1.0
  In  In1  3  0.0  0.0  0.18  1.0
  Hg  Hg2  3  0.0  0.0  0.53  1.0
  Pb  Pb3  3  0.0  0.0  0.35  1.0

Be In Hg Pb
Be In Hg Pb 0 1 - - - 1 3 o o o 2 3 o o o 
BeHgInPb crystallizes in the trigonal R3m space group. Be(1) is bonded to one In(1) and three equivalent Pb(1) atoms to form BeInPb3 trigonal pyramids that share  a cornercorner with one Pb(1)Be3InHg trigonal bipyramid, corners with six equivalent Be(1)InPb3 trigonal pyramids, and edges with three equivalent Hg(1)In3Pb trigonal pyramids. The Be(1)-In(1) bond length is 2.21 Å. All Be(1)-Pb(1) bond lengths are 2.99 Å. Hg(1) is bonded to three equivalent In(1) and one Pb(1) atom to form distorted HgIn3Pb trigonal pyramids that share corners with three equivalent Pb(1)Be3InHg trigonal bipyramids, corners with six equivalent Hg(1)In3Pb trigonal pyramids, and edges with three equivalent Be(1)InPb3 trigonal pyramids. All Hg(1)-In(1) bond lengths are 2.99 Å. The Hg(1)-Pb(1) bond length is 2.21 Å. In(1) is bonded in a 5-coordinate geometry to one Be(1), three equivalent Hg(1), and one Pb(1) atom. The In(1)-Pb(1) bond length is 2.21 Å. Pb(1) is bonded to three equivalent Be(1), one Hg(1), and one In(1) atom to form distorted PbBe3InHg trigonal bipyramids that share corners with six equivalent Pb(1)Be3InHg trigonal bipyramids,  a cornercorner with one Be(1)InPb3 trigonal pyramid, and corners with three equivalent Hg(1)In3Pb trigonal pyramids.