data_Be2CoSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.19
_cell_length_b   4.19
_cell_length_c   4.19
_cell_angle_alpha   134.68
_cell_angle_beta   132.77
_cell_angle_gamma   67.53
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be2CoSi
_chemical_formula_sum   'Be2 Co1 Si1'
_cell_volume   37.64
_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  0.61  0.0  0.75  1.0
  Be  Be1  1  0.0  0.68  0.73  1.0
  Co  Co2  1  0.0  0.0  0.48  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

data_Be2CoSi
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.23
_cell_length_b   3.35
_cell_length_c   4.19
_cell_angle_alpha   113.61
_cell_angle_beta   112.66
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be2CoSi
_chemical_formula_sum   'Be2 Co1 Si1'
_cell_volume   37.64
_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  0.75  0.14  1.0
  Be  Be1  1  0.32  0.05  0.05  1.0
  Co  Co2  1  0.0  0.48  0.48  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

Be Be Co Si
Be Be Co Si 0 3 + o + 0 2 + o + 0 2 o o o 1 3 o + + 1 2 o o o 1 2 o + + 1 2 o + o 2 3 o o o 2 3 o o + 
Be2CoSi is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Be2CoSi cluster. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a distorted single-bond geometry to one Co(1) and one Si(1) atom. The Be(1)-Co(1) bond length is 1.98 Å. The Be(1)-Si(1) bond length is 1.19 Å. In the second Be site, Be(2) is bonded in a single-bond geometry to one Si(1) atom. The Be(2)-Si(1) bond length is 0.98 Å. Co(1) is bonded in a 1-coordinate geometry to one Be(1) atom. Si(1) is bonded in a water-like geometry to one Be(1) and one Be(2) atom.