The material described by MgAl2 is beta-derived structured and crystallizes in the trigonal P-3m1 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 six equivalent Mg(1)Mg6Al6 cuboctahedra, corners with six equivalent Al(1)Mg3Al9 cuboctahedra, edges with six equivalent Mg(1)Mg6Al6 cuboctahedra, edges with eighteen equivalent Al(1)Mg3Al9 cuboctahedra, faces with six equivalent Mg(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Mg3Al9 cuboctahedra. Al(1) is bonded to three equivalent Mg(1) and nine equivalent Al(1) atoms to form AlMg3Al9 cuboctahedra that share corners with three equivalent Mg(1)Mg6Al6 cuboctahedra, corners with nine equivalent Al(1)Mg3Al9 cuboctahedra, edges with nine equivalent Mg(1)Mg6Al6 cuboctahedra, edges with fifteen equivalent Al(1)Mg3Al9 cuboctahedra, faces with six equivalent Mg(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Mg3Al9 cuboctahedra. is represented by the CIF file [CIF]
data_MgAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.934
_cell_length_b   2.934
_cell_length_c   7.203
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   53.696
_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  0.000  1.0
  Al  Al1  1  0.333  0.667  0.656  1.0
  Al  Al2  1  0.667  0.333  0.344  1.0
[/CIF]
.
The material described by MgAl2 is beta-derived structured and crystallizes in the trigonal P-3m1 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 six equivalent Mg(1)Mg6Al6 cuboctahedra, corners with six equivalent Al(1)Mg3Al9 cuboctahedra, edges with six equivalent Mg(1)Mg6Al6 cuboctahedra, edges with eighteen equivalent Al(1)Mg3Al9 cuboctahedra, faces with six equivalent Mg(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Mg3Al9 cuboctahedra. Al(1) is bonded to three equivalent Mg(1) and nine equivalent Al(1) atoms to form AlMg3Al9 cuboctahedra that share corners with three equivalent Mg(1)Mg6Al6 cuboctahedra, corners with nine equivalent Al(1)Mg3Al9 cuboctahedra, edges with nine equivalent Mg(1)Mg6Al6 cuboctahedra, edges with fifteen equivalent Al(1)Mg3Al9 cuboctahedra, faces with six equivalent Mg(1)Mg6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Mg3Al9 cuboctahedra. is represented by the CIF file [CIF]
data_MgAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.934
_cell_length_b   2.934
_cell_length_c   7.203
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   53.696
_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  0.000  1.0
  Al  Al1  1  0.333  0.667  0.656  1.0
  Al  Al2  1  0.667  0.333  0.344  1.0
[/CIF]
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