data_Be2CoAu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.81
_cell_length_b   3.81
_cell_length_c   2.97
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be2CoAu
_chemical_formula_sum   'Be2 Co1 Au1'
_cell_volume   43.2
_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  0.91  0.0  0.49  1.0
  Be  Be2  1  0.0  0.91  0.49  1.0
  Co  Co3  1  0.0  0.0  0.0  1.0
  Au  Au0  1  0.91  0.91  0.0  1.0

data_Be2CoAu
_symmetry_space_group_name_H-M   Amm2
_cell_length_a   2.97
_cell_length_b   5.39
_cell_length_c   5.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   38
_chemical_formula_structural   Be2CoAu
_chemical_formula_sum   'Be4 Co2 Au2'
_cell_volume   86.39
_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, y, z'
  4  'x, -y, z'
  5  'x, y+1/2, z+1/2'
  6  '-x, -y+1/2, z+1/2'
  7  '-x, y+1/2, z+1/2'
  8  'x, -y+1/2, z+1/2'
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  0.5  0.05  0.95  1.0
  Co  Co1  2  0.0  0.0  0.0  1.0
  Au  Au2  2  0.0  0.0  0.91  1.0

Be Be Co Au
(Be)2AuCo crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two AuCo clusters and two Be clusters. In each AuCo cluster, Co(1) is bonded in a single-bond geometry to one Au(1) atom. The Co(1)-Au(1) bond length is 0.51 Å. Au(1) is bonded in a single-bond geometry to one Co(1) atom. In each Be cluster, Be(1) is bonded in a distorted single-bond geometry to one Be(1) atom. The Be(1)-Be(1) bond length is 0.51 Å.