The material structure described by Mg11LaAl crystallizes in the monoclinic C2/m space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 1-coordinate geometry to one Mg(3), two equivalent Mg(4), four equivalent Mg(2), two equivalent La(1), and one Al(1) atom. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to one Mg(2), one Mg(3), two equivalent Mg(4), four equivalent Mg(1), one La(1), and one Al(1) atom. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to four equivalent Mg(1), four equivalent Mg(2), two equivalent La(1), and two equivalent Al(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(2), and two equivalent La(1) atoms to form a mixture of distorted corner and face-sharing MgLa2Mg10 cuboctahedra. La(1) is bonded in a 20-coordinate geometry to two equivalent Mg(3), four equivalent Mg(2), four equivalent Mg(4), eight equivalent Mg(1), and two equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), four equivalent Mg(2), and two equivalent La(1) atoms. is represented by the CIF file [CIF]
data_LaMg11Al
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.818
_cell_length_b   7.818
_cell_length_c   7.688
_cell_angle_alpha   81.539
_cell_angle_beta   81.539
_cell_angle_gamma   134.765
_symmetry_Int_Tables_number   1
_cell_volume   308.282
_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
  La  La0  1  0.000  0.000  0.000  1.0
  Mg  Mg1  1  0.713  0.501  0.782  1.0
  Mg  Mg2  1  0.287  0.499  0.218  1.0
  Mg  Mg3  1  0.499  0.287  0.218  1.0
  Mg  Mg4  1  0.501  0.713  0.782  1.0
  Mg  Mg5  1  0.650  0.996  0.352  1.0
  Mg  Mg6  1  0.350  0.004  0.648  1.0
  Mg  Mg7  1  0.004  0.350  0.648  1.0
  Mg  Mg8  1  0.996  0.650  0.352  1.0
  Mg  Mg9  1  0.000  0.000  0.500  1.0
  Mg  Mg10  1  0.500  0.000  0.000  1.0
  Mg  Mg11  1  0.000  0.500  0.000  1.0
  Al  Al12  1  0.500  0.500  0.500  1.0
[/CIF]
.
The material structure described by Mg11LaAl crystallizes in the monoclinic C2/m space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 1-coordinate geometry to one Mg(3), two equivalent Mg(4), four equivalent Mg(2), two equivalent La(1), and one Al(1) atom. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to one Mg(2), one Mg(3), two equivalent Mg(4), four equivalent Mg(1), one La(1), and one Al(1) atom. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to four equivalent Mg(1), four equivalent Mg(2), two equivalent La(1), and two equivalent Al(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(2), and two equivalent La(1) atoms to form a mixture of distorted corner and face-sharing MgLa2Mg10 cuboctahedra. La(1) is bonded in a 20-coordinate geometry to two equivalent Mg(3), four equivalent Mg(2), four equivalent Mg(4), eight equivalent Mg(1), and two equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), four equivalent Mg(2), and two equivalent La(1) atoms. is represented by the CIF file [CIF]
data_LaMg11Al
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.818
_cell_length_b   7.818
_cell_length_c   7.688
_cell_angle_alpha   81.539
_cell_angle_beta   81.539
_cell_angle_gamma   134.765
_symmetry_Int_Tables_number   1
_cell_volume   308.282
_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
  La  La0  1  0.000  0.000  0.000  1.0
  Mg  Mg1  1  0.713  0.501  0.782  1.0
  Mg  Mg2  1  0.287  0.499  0.218  1.0
  Mg  Mg3  1  0.499  0.287  0.218  1.0
  Mg  Mg4  1  0.501  0.713  0.782  1.0
  Mg  Mg5  1  0.650  0.996  0.352  1.0
  Mg  Mg6  1  0.350  0.004  0.648  1.0
  Mg  Mg7  1  0.004  0.350  0.648  1.0
  Mg  Mg8  1  0.996  0.650  0.352  1.0
  Mg  Mg9  1  0.000  0.000  0.500  1.0
  Mg  Mg10  1  0.500  0.000  0.000  1.0
  Mg  Mg11  1  0.000  0.500  0.000  1.0
  Al  Al12  1  0.500  0.500  0.500  1.0
[/CIF]
.