The compound described by MgAl crystallizes in the hexagonal P-6m2 space group. Mg(1) is bonded to six equivalent Mg(1) and six equivalent Al(1) atoms to form MgMg6Al6 cuboctahedra that share corners with eighteen equivalent Mg(1)Mg6Al6 cuboctahedra, edges with six equivalent Mg(1)Mg6Al6 cuboctahedra, edges with twelve equivalent Al(1)Mg6Al6 cuboctahedra, faces with eight equivalent Mg(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Mg6Al6 cuboctahedra. Al(1) is bonded to six equivalent Mg(1) and six equivalent Al(1) atoms to form distorted AlMg6Al6 cuboctahedra that share corners with eighteen equivalent Al(1)Mg6Al6 cuboctahedra, edges with six equivalent Al(1)Mg6Al6 cuboctahedra, edges with twelve equivalent Mg(1)Mg6Al6 cuboctahedra, faces with eight equivalent Al(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Mg(1)Mg6Al6 cuboctahedra. is represented by the CIF file [CIF]
data_MgAl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.994
_cell_length_b   2.994
_cell_length_c   4.851
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   37.658
_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
  Mg  Mg0  1  0.000  0.000  0.500  1.0
  Al  Al1  1  0.333  0.667  0.000  1.0
[/CIF]
.
The compound described by MgAl crystallizes in the hexagonal P-6m2 space group. Mg(1) is bonded to six equivalent Mg(1) and six equivalent Al(1) atoms to form MgMg6Al6 cuboctahedra that share corners with eighteen equivalent Mg(1)Mg6Al6 cuboctahedra, edges with six equivalent Mg(1)Mg6Al6 cuboctahedra, edges with twelve equivalent Al(1)Mg6Al6 cuboctahedra, faces with eight equivalent Mg(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Mg6Al6 cuboctahedra. Al(1) is bonded to six equivalent Mg(1) and six equivalent Al(1) atoms to form distorted AlMg6Al6 cuboctahedra that share corners with eighteen equivalent Al(1)Mg6Al6 cuboctahedra, edges with six equivalent Al(1)Mg6Al6 cuboctahedra, edges with twelve equivalent Mg(1)Mg6Al6 cuboctahedra, faces with eight equivalent Al(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Mg(1)Mg6Al6 cuboctahedra. is represented by the CIF file [CIF]
data_MgAl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.994
_cell_length_b   2.994
_cell_length_c   4.851
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   37.658
_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
  Mg  Mg0  1  0.000  0.000  0.500  1.0
  Al  Al1  1  0.333  0.667  0.000  1.0
[/CIF]
.