The compound described by Co4CuAl12 crystallizes in the monoclinic C2/m space group. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Cu(1), one Al(1), one Al(11), one Al(12), one Al(13), one Al(2), one Al(3), one Al(4), and one Al(5) atom. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to one Al(10), one Al(9), two equivalent Al(1), two equivalent Al(11), and two equivalent Al(4) atoms. In the third Co site, Co(3) is bonded in a 10-coordinate geometry to one Cu(1), one Al(8), two equivalent Al(2), two equivalent Al(3), two equivalent Al(6), and two equivalent Al(9) atoms. In the fourth Co site, Co(4) is bonded in a 10-coordinate geometry to one Al(12), one Al(8), two equivalent Al(2), two equivalent Al(3), two equivalent Al(6), and two equivalent Al(7) atoms. In the fifth Co site, Co(5) is bonded in a 10-coordinate geometry to one Cu(2), one Al(10), one Al(12), one Al(7), two equivalent Al(1), two equivalent Al(4), and two equivalent Al(5) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 10-coordinate geometry to one Co(3), two equivalent Co(1), one Al(11), one Al(8), one Al(9), two equivalent Al(3), and two equivalent Al(4) atoms. In the second Cu site, Cu(2) is bonded in a distorted cuboctahedral geometry to two equivalent Co(5), two equivalent Al(13), four equivalent Al(4), and four equivalent Al(5) atoms. There are thirteen inequivalent Al sites. In the first Al site, Al(1) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), one Co(5), and one Al(12) atom. In the second Al site, Al(2) is bonded in a 2-coordinate geometry to one Co(1), one Co(3), one Co(4), one Al(12), and two equivalent Al(3) atoms. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to one Co(1), one Co(3), one Co(4), one Cu(1), one Al(13), one Al(4), one Al(6), one Al(7), two equivalent Al(2), and two equivalent Al(8) atoms. In the fourth Al site, Al(4) is bonded in a 5-coordinate geometry to one Co(1), one Co(2), one Co(5), one Cu(1), one Cu(2), one Al(11), and one Al(3) atom. In the fifth Al site, Al(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(5), one Cu(2), and one Al(11) atom. In the sixth Al site, Al(6) is bonded in a 4-coordinate geometry to two equivalent Co(3), two equivalent Co(4), and two equivalent Al(3) atoms. In the seventh Al site, Al(7) is bonded in a 3-coordinate geometry to one Co(5), two equivalent Co(4), one Al(12), and two equivalent Al(3) atoms. In the eighth Al site, Al(8) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), one Cu(1), one Al(12), and four equivalent Al(3) atoms. In the ninth Al site, Al(9) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(3), and one Cu(1) atom. In the tenth Al site, Al(10) is bonded in a distorted linear geometry to one Co(2), one Co(5), one Al(11), and one Al(12) atom. In the eleventh Al site, Al(11) is bonded in a 11-coordinate geometry to two equivalent Co(1), two equivalent Co(2), one Cu(1), one Al(10), one Al(11), two equivalent Al(4), and two equivalent Al(5) atoms. In the twelfth Al site, Al(12) is bonded in a 11-coordinate geometry to one Co(4), one Co(5), two equivalent Co(1), one Al(10), one Al(7), one Al(8), two equivalent Al(1), and two equivalent Al(2) atoms. In the thirteenth Al site, Al(13) is bonded in a distorted linear geometry to two equivalent Co(1), one Cu(2), and two equivalent Al(3) atoms. is represented by the CIF file [CIF]
data_Al12Co4Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.537
_cell_length_b   8.537
_cell_length_c   12.252
_cell_angle_alpha   73.953
_cell_angle_beta   73.953
_cell_angle_gamma   55.453
_symmetry_Int_Tables_number   1
_cell_volume   698.702
_cell_formula_units_Z   3
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  0.963  0.395  0.163  1.0
  Al  Al1  1  0.395  0.963  0.163  1.0
  Al  Al2  1  0.972  0.399  0.386  1.0
  Al  Al3  1  0.399  0.972  0.386  1.0
  Al  Al4  1  0.148  0.594  0.389  1.0
  Al  Al5  1  0.594  0.148  0.389  1.0
  Al  Al6  1  0.258  0.726  0.173  1.0
  Al  Al7  1  0.726  0.258  0.173  1.0
  Al  Al8  1  0.161  0.577  0.021  1.0
  Al  Al9  1  0.577  0.161  0.021  1.0
  Al  Al10  1  0.251  0.749  0.500  1.0
  Al  Al11  1  0.749  0.251  0.500  1.0
  Al  Al12  1  0.037  0.605  0.837  1.0
  Al  Al13  1  0.605  0.037  0.837  1.0
  Al  Al14  1  0.028  0.601  0.614  1.0
  Al  Al15  1  0.520  0.520  0.332  1.0
  Al  Al16  1  0.238  0.238  0.543  1.0
  Al  Al17  1  0.057  0.057  0.325  1.0
  Al  Al18  1  0.235  0.235  0.964  1.0
  Al  Al19  1  0.480  0.480  0.668  1.0
  Al  Al20  1  0.762  0.762  0.457  1.0
  Al  Al21  1  0.943  0.943  0.675  1.0
  Al  Al22  1  0.765  0.765  0.036  1.0
  Al  Al23  1  0.075  0.075  0.912  1.0
  Al  Al24  1  0.301  0.301  0.730  1.0
  Al  Al25  1  0.925  0.925  0.088  1.0
  Al  Al26  1  0.699  0.699  0.270  1.0
  Al  Al27  1  0.663  0.663  0.782  1.0
  Al  Al28  1  0.337  0.337  0.218  1.0
  Al  Al29  1  0.423  0.839  0.979  1.0
  Al  Al30  1  0.839  0.423  0.979  1.0
  Al  Al31  1  0.274  0.742  0.827  1.0
  Al  Al32  1  0.742  0.274  0.827  1.0
  Al  Al33  1  0.406  0.852  0.611  1.0
  Al  Al34  1  0.852  0.406  0.611  1.0
  Al  Al35  1  0.601  0.028  0.614  1.0
  Co  Co36  1  0.036  0.599  0.220  1.0
  Co  Co37  1  0.599  0.036  0.220  1.0
  Co  Co38  1  0.964  0.401  0.780  1.0
  Co  Co39  1  0.401  0.964  0.780  1.0
  Co  Co40  1  0.913  0.913  0.890  1.0
  Co  Co41  1  0.908  0.908  0.496  1.0
  Co  Co42  1  0.600  0.600  0.482  1.0
  Co  Co43  1  0.397  0.397  0.869  1.0
  Co  Co44  1  0.087  0.087  0.110  1.0
  Co  Co45  1  0.092  0.092  0.504  1.0
  Co  Co46  1  0.400  0.400  0.518  1.0
  Co  Co47  1  0.603  0.603  0.131  1.0
  Cu  Cu48  1  0.912  0.912  0.286  1.0
  Cu  Cu49  1  0.088  0.088  0.714  1.0
  Cu  Cu50  1  0.500  0.500  0.000  1.0
[/CIF]
.
The compound described by Co4CuAl12 crystallizes in the monoclinic C2/m space group. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Cu(1), one Al(1), one Al(11), one Al(12), one Al(13), one Al(2), one Al(3), one Al(4), and one Al(5) atom. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to one Al(10), one Al(9), two equivalent Al(1), two equivalent Al(11), and two equivalent Al(4) atoms. In the third Co site, Co(3) is bonded in a 10-coordinate geometry to one Cu(1), one Al(8), two equivalent Al(2), two equivalent Al(3), two equivalent Al(6), and two equivalent Al(9) atoms. In the fourth Co site, Co(4) is bonded in a 10-coordinate geometry to one Al(12), one Al(8), two equivalent Al(2), two equivalent Al(3), two equivalent Al(6), and two equivalent Al(7) atoms. In the fifth Co site, Co(5) is bonded in a 10-coordinate geometry to one Cu(2), one Al(10), one Al(12), one Al(7), two equivalent Al(1), two equivalent Al(4), and two equivalent Al(5) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 10-coordinate geometry to one Co(3), two equivalent Co(1), one Al(11), one Al(8), one Al(9), two equivalent Al(3), and two equivalent Al(4) atoms. In the second Cu site, Cu(2) is bonded in a distorted cuboctahedral geometry to two equivalent Co(5), two equivalent Al(13), four equivalent Al(4), and four equivalent Al(5) atoms. There are thirteen inequivalent Al sites. In the first Al site, Al(1) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), one Co(5), and one Al(12) atom. In the second Al site, Al(2) is bonded in a 2-coordinate geometry to one Co(1), one Co(3), one Co(4), one Al(12), and two equivalent Al(3) atoms. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to one Co(1), one Co(3), one Co(4), one Cu(1), one Al(13), one Al(4), one Al(6), one Al(7), two equivalent Al(2), and two equivalent Al(8) atoms. In the fourth Al site, Al(4) is bonded in a 5-coordinate geometry to one Co(1), one Co(2), one Co(5), one Cu(1), one Cu(2), one Al(11), and one Al(3) atom. In the fifth Al site, Al(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(5), one Cu(2), and one Al(11) atom. In the sixth Al site, Al(6) is bonded in a 4-coordinate geometry to two equivalent Co(3), two equivalent Co(4), and two equivalent Al(3) atoms. In the seventh Al site, Al(7) is bonded in a 3-coordinate geometry to one Co(5), two equivalent Co(4), one Al(12), and two equivalent Al(3) atoms. In the eighth Al site, Al(8) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), one Cu(1), one Al(12), and four equivalent Al(3) atoms. In the ninth Al site, Al(9) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(3), and one Cu(1) atom. In the tenth Al site, Al(10) is bonded in a distorted linear geometry to one Co(2), one Co(5), one Al(11), and one Al(12) atom. In the eleventh Al site, Al(11) is bonded in a 11-coordinate geometry to two equivalent Co(1), two equivalent Co(2), one Cu(1), one Al(10), one Al(11), two equivalent Al(4), and two equivalent Al(5) atoms. In the twelfth Al site, Al(12) is bonded in a 11-coordinate geometry to one Co(4), one Co(5), two equivalent Co(1), one Al(10), one Al(7), one Al(8), two equivalent Al(1), and two equivalent Al(2) atoms. In the thirteenth Al site, Al(13) is bonded in a distorted linear geometry to two equivalent Co(1), one Cu(2), and two equivalent Al(3) atoms. is represented by the CIF file [CIF]
data_Al12Co4Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.537
_cell_length_b   8.537
_cell_length_c   12.252
_cell_angle_alpha   73.953
_cell_angle_beta   73.953
_cell_angle_gamma   55.453
_symmetry_Int_Tables_number   1
_cell_volume   698.702
_cell_formula_units_Z   3
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  0.963  0.395  0.163  1.0
  Al  Al1  1  0.395  0.963  0.163  1.0
  Al  Al2  1  0.972  0.399  0.386  1.0
  Al  Al3  1  0.399  0.972  0.386  1.0
  Al  Al4  1  0.148  0.594  0.389  1.0
  Al  Al5  1  0.594  0.148  0.389  1.0
  Al  Al6  1  0.258  0.726  0.173  1.0
  Al  Al7  1  0.726  0.258  0.173  1.0
  Al  Al8  1  0.161  0.577  0.021  1.0
  Al  Al9  1  0.577  0.161  0.021  1.0
  Al  Al10  1  0.251  0.749  0.500  1.0
  Al  Al11  1  0.749  0.251  0.500  1.0
  Al  Al12  1  0.037  0.605  0.837  1.0
  Al  Al13  1  0.605  0.037  0.837  1.0
  Al  Al14  1  0.028  0.601  0.614  1.0
  Al  Al15  1  0.520  0.520  0.332  1.0
  Al  Al16  1  0.238  0.238  0.543  1.0
  Al  Al17  1  0.057  0.057  0.325  1.0
  Al  Al18  1  0.235  0.235  0.964  1.0
  Al  Al19  1  0.480  0.480  0.668  1.0
  Al  Al20  1  0.762  0.762  0.457  1.0
  Al  Al21  1  0.943  0.943  0.675  1.0
  Al  Al22  1  0.765  0.765  0.036  1.0
  Al  Al23  1  0.075  0.075  0.912  1.0
  Al  Al24  1  0.301  0.301  0.730  1.0
  Al  Al25  1  0.925  0.925  0.088  1.0
  Al  Al26  1  0.699  0.699  0.270  1.0
  Al  Al27  1  0.663  0.663  0.782  1.0
  Al  Al28  1  0.337  0.337  0.218  1.0
  Al  Al29  1  0.423  0.839  0.979  1.0
  Al  Al30  1  0.839  0.423  0.979  1.0
  Al  Al31  1  0.274  0.742  0.827  1.0
  Al  Al32  1  0.742  0.274  0.827  1.0
  Al  Al33  1  0.406  0.852  0.611  1.0
  Al  Al34  1  0.852  0.406  0.611  1.0
  Al  Al35  1  0.601  0.028  0.614  1.0
  Co  Co36  1  0.036  0.599  0.220  1.0
  Co  Co37  1  0.599  0.036  0.220  1.0
  Co  Co38  1  0.964  0.401  0.780  1.0
  Co  Co39  1  0.401  0.964  0.780  1.0
  Co  Co40  1  0.913  0.913  0.890  1.0
  Co  Co41  1  0.908  0.908  0.496  1.0
  Co  Co42  1  0.600  0.600  0.482  1.0
  Co  Co43  1  0.397  0.397  0.869  1.0
  Co  Co44  1  0.087  0.087  0.110  1.0
  Co  Co45  1  0.092  0.092  0.504  1.0
  Co  Co46  1  0.400  0.400  0.518  1.0
  Co  Co47  1  0.603  0.603  0.131  1.0
  Cu  Cu48  1  0.912  0.912  0.286  1.0
  Cu  Cu49  1  0.088  0.088  0.714  1.0
  Cu  Cu50  1  0.500  0.500  0.000  1.0
[/CIF]
.