data_TaBe2Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.76
_cell_length_b   2.76
_cell_length_c   5.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaBe2Co
_chemical_formula_sum   'Ta1 Be2 Co1'
_cell_volume   44.32
_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
  Ta  Ta3  1  0.0  0.0  0.92  1.0
  Be  Be0  1  0.38  0.38  0.71  1.0
  Be  Be1  1  0.38  0.38  0.12  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0

data_TaBe2Co
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.9
_cell_length_b   3.9
_cell_length_c   5.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TaBe2Co
_chemical_formula_sum   'Ta2 Be4 Co2'
_cell_volume   88.63
_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
  Ta  Ta0  2  0.0  0.0  0.92  1.0
  Be  Be1  2  0.38  0.0  0.12  1.0
  Be  Be2  2  0.38  0.0  0.71  1.0
  Co  Co3  2  0.0  0.0  0.0  1.0

Ta Be Be Co
Ta Be Be Co 0 3 o o + 0 1 o o o 0 1 o - o 0 1 - o o 0 2 o o + 1 3 o o + 1 3 o + + 1 3 + o + 1 2 o o + 2 3 o o o 
Be2TaCo crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Be2TaCo clusters. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a 1-coordinate geometry to one Ta(1) atom. The Be(1)-Ta(1) bond length is 1.89 Å. In the second Be site, Be(2) is bonded in a 1-coordinate geometry to one Co(1) atom. The Be(2)-Co(1) bond length is 1.63 Å. Ta(1) is bonded in a single-bond geometry to one Be(1) and one Co(1) atom. The Ta(1)-Co(1) bond length is 0.48 Å. Co(1) is bonded in a single-bond geometry to one Be(2) and one Ta(1) atom.