data_BeAgSnPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   5.04
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeAgSnPb
_chemical_formula_sum   'Be1 Ag1 Sn1 Pb1'
_cell_volume   90.36
_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  Be1  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.78  0.78  0.78  1.0
  Sn  Sn3  1  0.56  0.56  0.56  1.0
  Pb  Pb2  1  0.34  0.34  0.34  1.0

data_BeAgSnPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   12.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   BeAgSnPb
_chemical_formula_sum   'Be3 Ag3 Sn3 Pb3'
_cell_volume   271.07
_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
  Ag  Ag1  3  0.0  0.0  0.22  1.0
  Sn  Sn2  3  0.0  0.0  0.44  1.0
  Pb  Pb3  3  0.0  0.0  0.66  1.0

Be Ag Sn Pb
BeAgPbSn crystallizes in the trigonal R3m space group. Be(1) is bonded to one Ag(1) and three equivalent Pb(1) atoms to form BeAgPb3 trigonal pyramids that share corners with three equivalent Pb(1)Be3Ag3Sn4 trigonal pyramids and corners with six equivalent Be(1)AgPb3 trigonal pyramids. The Be(1)-Ag(1) bond length is 2.70 Å. All Be(1)-Pb(1) bond lengths are 2.91 Å. Ag(1) is bonded in a 1-coordinate geometry to one Be(1) and three equivalent Pb(1) atoms. All Ag(1)-Pb(1) bond lengths are 3.18 Å. Pb(1) is bonded to three equivalent Be(1), three equivalent Ag(1), and four equivalent Sn(1) atoms to form distorted PbBe3Ag3Sn4 trigonal pyramids that share corners with three equivalent Be(1)AgPb3 trigonal pyramids, corners with six equivalent Pb(1)Be3Ag3Sn4 trigonal pyramids, and faces with six equivalent Pb(1)Be3Ag3Sn4 trigonal pyramids. There is one shorter (2.70 Å) and three longer (3.23 Å) Pb(1)-Sn(1) bond lengths. Sn(1) is bonded in a 1-coordinate geometry to four equivalent Pb(1) atoms.