data_AlCo2Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.05
_cell_length_b   4.05
_cell_length_c   4.05
_cell_angle_alpha   123.43
_cell_angle_beta   123.43
_cell_angle_gamma   84.16
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlCo2Si
_chemical_formula_sum   'Al1 Co2 Si1'
_cell_volume   44.35
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Co  Co1  1  0.92  0.0  0.5  1.0
  Co  Co2  1  0.0  0.92  0.5  1.0
  Si  Si3  1  0.0  0.0  0.01  1.0

data_AlCo2Si
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.43
_cell_length_b   5.43
_cell_length_c   4.05
_cell_angle_alpha   90.0
_cell_angle_beta   132.08
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   AlCo2Si
_chemical_formula_sum   'Al2 Co4 Si2'
_cell_volume   88.71
_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
  Al  Al0  2  0.0  0.0  0.0  1.0
  Co  Co1  4  0.46  0.04  0.42  1.0
  Si  Si2  2  0.49  0.5  0.99  1.0

Al Co Co Si
(Co)2AlSi is Zincblende, Sphalerite structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two 11145-27-0 molecules and two Co clusters. In each Co cluster, Co(1) is bonded in a distorted single-bond geometry to one Co(1) atom. The Co(1)-Co(1) bond length is 0.43 Å.