data_BePb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.91
_cell_length_b   6.91
_cell_length_c   6.91
_cell_angle_alpha   32.86
_cell_angle_beta   32.86
_cell_angle_gamma   32.86
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BePb
_chemical_formula_sum   'Be2 Pb2'
_cell_volume   86.41
_cell_formula_units_Z   2
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  0.02  1.0
  Be  Be1  1  0.0  0.0  0.57  1.0
  Pb  Pb2  1  0.0  0.0  0.63  1.0
  Pb  Pb3  1  0.0  0.0  0.96  1.0

data_BePb
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   6.77
_cell_length_b   3.91
_cell_length_c   6.91
_cell_angle_alpha   90.0
_cell_angle_beta   109.06
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   BePb
_chemical_formula_sum   'Be4 Pb4'
_cell_volume   172.81
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-x, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  '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  4  0.0  0.0  0.22  1.0
  Pb  Pb1  4  0.0  0.0  0.16  1.0

Be Be Pb Pb