data_CrB2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.03
_cell_length_b   3.03
_cell_length_c   5.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrB2Pb
_chemical_formula_sum   'Cr1 B2 Pb1'
_cell_volume   49.83
_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
  Cr  Cr2  1  0.0  0.0  0.0  1.0
  B  B0  1  0.51  0.51  0.02  1.0
  B  B1  1  0.51  0.51  0.41  1.0
  Pb  Pb3  1  0.0  0.0  0.72  1.0

data_CrB2Pb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.28
_cell_length_b   4.28
_cell_length_c   5.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CrB2Pb
_chemical_formula_sum   'Cr2 B4 Pb2'
_cell_volume   99.66
_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
  Cr  Cr0  2  0.0  0.0  0.0  1.0
  B  B1  2  0.01  0.5  0.02  1.0
  B  B2  2  0.01  0.5  0.41  1.0
  Pb  Pb3  2  0.0  0.0  0.72  1.0

Cr B B Pb
CrB2Pb crystallizes in the monoclinic Cm space group. Cr(1) is bonded to four equivalent B(1) and one Pb(1) atom to form a mixture of distorted corner and edge-sharing CrB4Pb square pyramids. There are a spread of Cr(1)-B(1) bond distances ranging from 2.08-2.21 Å. The Cr(1)-Pb(1) bond length is 1.55 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 4-coordinate geometry to four equivalent Cr(1) and one B(2) atom. The B(1)-B(2) bond length is 2.13 Å. In the second B site, B(2) is bonded in a 5-coordinate geometry to one B(1) and four equivalent Pb(1) atoms. There are a spread of B(2)-Pb(1) bond distances ranging from 2.65-2.75 Å. Pb(1) is bonded in a single-bond geometry to one Cr(1) and four equivalent B(2) atoms.