data_Be2CoSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.43
_cell_length_b   7.43
_cell_length_c   7.43
_cell_angle_alpha   23.24
_cell_angle_beta   23.24
_cell_angle_gamma   23.24
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be2CoSb
_chemical_formula_sum   'Be2 Co1 Sb1'
_cell_volume   56.08
_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  0.87  1.0
  Be  Be1  1  0.0  0.0  0.81  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Sb  Sb3  1  0.0  0.0  0.84  1.0

data_Be2CoSb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.18
_cell_length_b   2.99
_cell_length_c   7.43
_cell_angle_alpha   90.0
_cell_angle_beta   103.45
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Be2CoSb
_chemical_formula_sum   'Be4 Co2 Sb2'
_cell_volume   112.15
_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  0.13  1.0
  Be  Be1  2  0.0  0.0  0.19  1.0
  Co  Co2  2  0.0  0.0  0.0  1.0
  Sb  Sb3  2  0.0  0.0  0.16  1.0

Be Be Co Sb
Be2CoSb is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Be2CoSb clusters. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a linear geometry to one Co(1) and one Sb(1) atom. The Be(1)-Co(1) bond length is 0.97 Å. The Be(1)-Sb(1) bond length is 0.22 Å. In the second Be site, Be(2) is bonded in a single-bond geometry to one Sb(1) atom. The Be(2)-Sb(1) bond length is 0.22 Å. Co(1) is bonded in a single-bond geometry to one Be(1) atom. Sb(1) is bonded in a linear geometry to one Be(1) and one Be(2) atom.