The crystal structure described by Al5Cu6Mg2 crystallizes in the cubic Pm-3 space group. Mg(1) is bonded in a 15-coordinate geometry to one Mg(1), six equivalent Cu(1), four equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Al(1) and four equivalent Al(2) atoms. In the second Cu site, Cu(1) is bonded in a 12-coordinate geometry to three equivalent Mg(1), five equivalent Cu(1), one Al(1), one Al(3), and two equivalent Al(2) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1), two equivalent Cu(1), and two equivalent Cu(2) atoms. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to three equivalent Mg(1), three equivalent Cu(1), and three equivalent Cu(2) atoms. In the third Al site, Al(3) is bonded in a cuboctahedral geometry to twelve equivalent Cu(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Al5Cu6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.186
_cell_length_b   8.186
_cell_length_c   8.186
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   548.615
_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
  Mg  Mg0  1  0.679  0.000  0.500  1.0
  Mg  Mg1  1  0.500  0.321  0.000  1.0
  Mg  Mg2  1  0.000  0.500  0.321  1.0
  Mg  Mg3  1  0.500  0.679  0.000  1.0
  Mg  Mg4  1  0.000  0.500  0.679  1.0
  Mg  Mg5  1  0.321  0.000  0.500  1.0
  Al  Al6  1  0.500  0.000  0.833  1.0
  Al  Al7  1  0.218  0.218  0.218  1.0
  Al  Al8  1  0.782  0.782  0.218  1.0
  Al  Al9  1  0.218  0.782  0.782  1.0
  Al  Al10  1  0.833  0.500  0.000  1.0
  Al  Al11  1  0.782  0.782  0.782  1.0
  Al  Al12  1  0.218  0.218  0.782  1.0
  Al  Al13  1  0.782  0.218  0.218  1.0
  Al  Al14  1  0.218  0.782  0.218  1.0
  Al  Al15  1  0.000  0.833  0.500  1.0
  Al  Al16  1  0.500  0.000  0.167  1.0
  Al  Al17  1  0.000  0.167  0.500  1.0
  Al  Al18  1  0.167  0.500  0.000  1.0
  Al  Al19  1  0.500  0.500  0.500  1.0
  Al  Al20  1  0.782  0.218  0.782  1.0
  Cu  Cu21  1  0.500  0.245  0.334  1.0
  Cu  Cu22  1  0.334  0.500  0.245  1.0
  Cu  Cu23  1  0.245  0.334  0.500  1.0
  Cu  Cu24  1  0.755  0.666  0.500  1.0
  Cu  Cu25  1  0.334  0.500  0.755  1.0
  Cu  Cu26  1  0.755  0.334  0.500  1.0
  Cu  Cu27  1  0.666  0.500  0.245  1.0
  Cu  Cu28  1  0.666  0.500  0.755  1.0
  Cu  Cu29  1  0.245  0.666  0.500  1.0
  Cu  Cu30  1  0.500  0.755  0.666  1.0
  Cu  Cu31  1  0.500  0.245  0.666  1.0
  Cu  Cu32  1  0.500  0.755  0.334  1.0
  Cu  Cu33  1  0.772  0.000  0.000  1.0
  Cu  Cu34  1  0.000  0.772  0.000  1.0
  Cu  Cu35  1  0.000  0.000  0.228  1.0
  Cu  Cu36  1  0.000  0.228  0.000  1.0
  Cu  Cu37  1  0.228  0.000  0.000  1.0
  Cu  Cu38  1  0.000  0.000  0.772  1.0
[/CIF]
.
The crystal structure described by Al5Cu6Mg2 crystallizes in the cubic Pm-3 space group. Mg(1) is bonded in a 15-coordinate geometry to one Mg(1), six equivalent Cu(1), four equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(2) is bonded in a 6-coordinate geometry to two equivalent Al(1) and four equivalent Al(2) atoms. In the second Cu site, Cu(1) is bonded in a 12-coordinate geometry to three equivalent Mg(1), five equivalent Cu(1), one Al(1), one Al(3), and two equivalent Al(2) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to four equivalent Mg(1), two equivalent Cu(1), and two equivalent Cu(2) atoms. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to three equivalent Mg(1), three equivalent Cu(1), and three equivalent Cu(2) atoms. In the third Al site, Al(3) is bonded in a cuboctahedral geometry to twelve equivalent Cu(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Al5Cu6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.186
_cell_length_b   8.186
_cell_length_c   8.186
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   548.615
_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
  Mg  Mg0  1  0.679  0.000  0.500  1.0
  Mg  Mg1  1  0.500  0.321  0.000  1.0
  Mg  Mg2  1  0.000  0.500  0.321  1.0
  Mg  Mg3  1  0.500  0.679  0.000  1.0
  Mg  Mg4  1  0.000  0.500  0.679  1.0
  Mg  Mg5  1  0.321  0.000  0.500  1.0
  Al  Al6  1  0.500  0.000  0.833  1.0
  Al  Al7  1  0.218  0.218  0.218  1.0
  Al  Al8  1  0.782  0.782  0.218  1.0
  Al  Al9  1  0.218  0.782  0.782  1.0
  Al  Al10  1  0.833  0.500  0.000  1.0
  Al  Al11  1  0.782  0.782  0.782  1.0
  Al  Al12  1  0.218  0.218  0.782  1.0
  Al  Al13  1  0.782  0.218  0.218  1.0
  Al  Al14  1  0.218  0.782  0.218  1.0
  Al  Al15  1  0.000  0.833  0.500  1.0
  Al  Al16  1  0.500  0.000  0.167  1.0
  Al  Al17  1  0.000  0.167  0.500  1.0
  Al  Al18  1  0.167  0.500  0.000  1.0
  Al  Al19  1  0.500  0.500  0.500  1.0
  Al  Al20  1  0.782  0.218  0.782  1.0
  Cu  Cu21  1  0.500  0.245  0.334  1.0
  Cu  Cu22  1  0.334  0.500  0.245  1.0
  Cu  Cu23  1  0.245  0.334  0.500  1.0
  Cu  Cu24  1  0.755  0.666  0.500  1.0
  Cu  Cu25  1  0.334  0.500  0.755  1.0
  Cu  Cu26  1  0.755  0.334  0.500  1.0
  Cu  Cu27  1  0.666  0.500  0.245  1.0
  Cu  Cu28  1  0.666  0.500  0.755  1.0
  Cu  Cu29  1  0.245  0.666  0.500  1.0
  Cu  Cu30  1  0.500  0.755  0.666  1.0
  Cu  Cu31  1  0.500  0.245  0.666  1.0
  Cu  Cu32  1  0.500  0.755  0.334  1.0
  Cu  Cu33  1  0.772  0.000  0.000  1.0
  Cu  Cu34  1  0.000  0.772  0.000  1.0
  Cu  Cu35  1  0.000  0.000  0.228  1.0
  Cu  Cu36  1  0.000  0.228  0.000  1.0
  Cu  Cu37  1  0.228  0.000  0.000  1.0
  Cu  Cu38  1  0.000  0.000  0.772  1.0
[/CIF]
.