data_Be2AgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.04
_cell_length_b   3.04
_cell_length_c   7.36
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be2AgPb
_chemical_formula_sum   'Be2 Ag1 Pb1'
_cell_volume   67.85
_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  0.52  0.52  0.25  1.0
  Be  Be2  1  0.0  0.0  0.21  1.0
  Ag  Ag0  1  0.0  0.0  0.17  1.0
  Pb  Pb3  1  0.52  0.52  0.41  1.0

data_Be2AgPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.29
_cell_length_b   4.29
_cell_length_c   7.36
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Be2AgPb
_chemical_formula_sum   'Be4 Ag2 Pb2'
_cell_volume   135.69
_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  0.21  1.0
  Be  Be1  2  0.02  0.5  0.25  1.0
  Ag  Ag2  2  0.0  0.0  0.17  1.0
  Pb  Pb3  2  0.02  0.5  0.41  1.0

Be Be Ag Pb
Be Be Ag Pb 0 3 o o o 1 2 o o o 
BeAgBePb is beta oxygen-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two BeAg clusters and two BePb clusters. In each BeAg cluster, Be(2) is bonded in a single-bond geometry to one Ag(1) atom. The Be(2)-Ag(1) bond length is 0.35 Å. Ag(1) is bonded in a single-bond geometry to one Be(2) atom. In each BePb cluster, Be(1) is bonded in a single-bond geometry to one Pb(1) atom. The Be(1)-Pb(1) bond length is 1.15 Å. Pb(1) is bonded in a single-bond geometry to one Be(1) atom.