The crystal structure described by Al5Co2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to three equivalent Al(2) and six equivalent Al(3) atoms. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Al(2), and six equivalent Al(3) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to six equivalent Co(2) and six equivalent Al(3) atoms to form distorted face-sharing AlAl6Co6 cuboctahedra. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to one Co(1) and two equivalent Co(2) atoms. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to one Co(1), three equivalent Co(2), and one Al(1) atom. is represented by the CIF file [CIF]
data_Al5Co2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.605
_cell_length_b   7.605
_cell_length_c   7.514
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   376.331
_cell_formula_units_Z   4
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  0.000  0.000  0.000  1.0
  Al  Al1  1  0.000  0.000  0.500  1.0
  Al  Al2  1  0.468  0.936  0.250  1.0
  Al  Al3  1  0.532  0.468  0.750  1.0
  Al  Al4  1  0.936  0.468  0.750  1.0
  Al  Al5  1  0.064  0.532  0.250  1.0
  Al  Al6  1  0.468  0.532  0.250  1.0
  Al  Al7  1  0.532  0.064  0.750  1.0
  Al  Al8  1  0.194  0.388  0.939  1.0
  Al  Al9  1  0.806  0.194  0.439  1.0
  Al  Al10  1  0.388  0.194  0.439  1.0
  Al  Al11  1  0.612  0.806  0.939  1.0
  Al  Al12  1  0.194  0.806  0.939  1.0
  Al  Al13  1  0.806  0.612  0.061  1.0
  Al  Al14  1  0.806  0.194  0.061  1.0
  Al  Al15  1  0.806  0.612  0.439  1.0
  Al  Al16  1  0.388  0.194  0.061  1.0
  Al  Al17  1  0.612  0.806  0.561  1.0
  Al  Al18  1  0.194  0.388  0.561  1.0
  Al  Al19  1  0.194  0.806  0.561  1.0
  Co  Co20  1  0.333  0.667  0.750  1.0
  Co  Co21  1  0.667  0.333  0.250  1.0
  Co  Co22  1  0.127  0.254  0.250  1.0
  Co  Co23  1  0.873  0.127  0.750  1.0
  Co  Co24  1  0.254  0.127  0.750  1.0
  Co  Co25  1  0.746  0.873  0.250  1.0
  Co  Co26  1  0.127  0.873  0.250  1.0
  Co  Co27  1  0.873  0.746  0.750  1.0
[/CIF]
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The crystal structure described by Al5Co2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to three equivalent Al(2) and six equivalent Al(3) atoms. In the second Co site, Co(2) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Al(2), and six equivalent Al(3) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to six equivalent Co(2) and six equivalent Al(3) atoms to form distorted face-sharing AlAl6Co6 cuboctahedra. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to one Co(1) and two equivalent Co(2) atoms. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to one Co(1), three equivalent Co(2), and one Al(1) atom. is represented by the CIF file [CIF]
data_Al5Co2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.605
_cell_length_b   7.605
_cell_length_c   7.514
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   376.331
_cell_formula_units_Z   4
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  0.000  0.000  0.000  1.0
  Al  Al1  1  0.000  0.000  0.500  1.0
  Al  Al2  1  0.468  0.936  0.250  1.0
  Al  Al3  1  0.532  0.468  0.750  1.0
  Al  Al4  1  0.936  0.468  0.750  1.0
  Al  Al5  1  0.064  0.532  0.250  1.0
  Al  Al6  1  0.468  0.532  0.250  1.0
  Al  Al7  1  0.532  0.064  0.750  1.0
  Al  Al8  1  0.194  0.388  0.939  1.0
  Al  Al9  1  0.806  0.194  0.439  1.0
  Al  Al10  1  0.388  0.194  0.439  1.0
  Al  Al11  1  0.612  0.806  0.939  1.0
  Al  Al12  1  0.194  0.806  0.939  1.0
  Al  Al13  1  0.806  0.612  0.061  1.0
  Al  Al14  1  0.806  0.194  0.061  1.0
  Al  Al15  1  0.806  0.612  0.439  1.0
  Al  Al16  1  0.388  0.194  0.061  1.0
  Al  Al17  1  0.612  0.806  0.561  1.0
  Al  Al18  1  0.194  0.388  0.561  1.0
  Al  Al19  1  0.194  0.806  0.561  1.0
  Co  Co20  1  0.333  0.667  0.750  1.0
  Co  Co21  1  0.667  0.333  0.250  1.0
  Co  Co22  1  0.127  0.254  0.250  1.0
  Co  Co23  1  0.873  0.127  0.750  1.0
  Co  Co24  1  0.254  0.127  0.750  1.0
  Co  Co25  1  0.746  0.873  0.250  1.0
  Co  Co26  1  0.127  0.873  0.250  1.0
  Co  Co27  1  0.873  0.746  0.750  1.0
[/CIF]
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