The compound described by MgLa5 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to six equivalent La(1) and six equivalent La(2) atoms to form MgLa12 cuboctahedra that share corners with eighteen equivalent La(1)La9Mg3 cuboctahedra, edges with six equivalent Mg(1)La12 cuboctahedra, edges with twelve equivalent La(2)La10Mg2 cuboctahedra, faces with two equivalent Mg(1)La12 cuboctahedra, faces with six equivalent La(1)La9Mg3 cuboctahedra, and faces with twelve equivalent La(2)La10Mg2 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to three equivalent Mg(1), three equivalent La(1), and six equivalent La(2) atoms to form LaLa9Mg3 cuboctahedra that share corners with nine equivalent Mg(1)La12 cuboctahedra, corners with nine equivalent La(1)La9Mg3 cuboctahedra, edges with six equivalent La(1)La9Mg3 cuboctahedra, edges with twelve equivalent La(2)La10Mg2 cuboctahedra, faces with three equivalent Mg(1)La12 cuboctahedra, faces with five equivalent La(1)La9Mg3 cuboctahedra, and faces with twelve equivalent La(2)La10Mg2 cuboctahedra. In the second La site, La(2) is bonded to two equivalent Mg(1), four equivalent La(1), and six equivalent La(2) atoms to form distorted LaLa10Mg2 cuboctahedra that share corners with eighteen equivalent La(2)La10Mg2 cuboctahedra, edges with four equivalent Mg(1)La12 cuboctahedra, edges with six equivalent La(2)La10Mg2 cuboctahedra, edges with eight equivalent La(1)La9Mg3 cuboctahedra, faces with four equivalent Mg(1)La12 cuboctahedra, faces with eight equivalent La(2)La10Mg2 cuboctahedra, and faces with eight equivalent La(1)La9Mg3 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_La5Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.431
_cell_length_b   6.431
_cell_length_c   5.826
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   208.658
_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
  La  La0  1  0.333  0.667  0.500  1.0
  La  La1  1  0.000  0.688  0.000  1.0
  La  La2  1  0.688  0.000  0.000  1.0
  La  La3  1  0.312  0.312  0.000  1.0
  La  La4  1  0.667  0.333  0.500  1.0
  Mg  Mg5  1  0.000  0.000  0.500  1.0
[/CIF]
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The compound described by MgLa5 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to six equivalent La(1) and six equivalent La(2) atoms to form MgLa12 cuboctahedra that share corners with eighteen equivalent La(1)La9Mg3 cuboctahedra, edges with six equivalent Mg(1)La12 cuboctahedra, edges with twelve equivalent La(2)La10Mg2 cuboctahedra, faces with two equivalent Mg(1)La12 cuboctahedra, faces with six equivalent La(1)La9Mg3 cuboctahedra, and faces with twelve equivalent La(2)La10Mg2 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to three equivalent Mg(1), three equivalent La(1), and six equivalent La(2) atoms to form LaLa9Mg3 cuboctahedra that share corners with nine equivalent Mg(1)La12 cuboctahedra, corners with nine equivalent La(1)La9Mg3 cuboctahedra, edges with six equivalent La(1)La9Mg3 cuboctahedra, edges with twelve equivalent La(2)La10Mg2 cuboctahedra, faces with three equivalent Mg(1)La12 cuboctahedra, faces with five equivalent La(1)La9Mg3 cuboctahedra, and faces with twelve equivalent La(2)La10Mg2 cuboctahedra. In the second La site, La(2) is bonded to two equivalent Mg(1), four equivalent La(1), and six equivalent La(2) atoms to form distorted LaLa10Mg2 cuboctahedra that share corners with eighteen equivalent La(2)La10Mg2 cuboctahedra, edges with four equivalent Mg(1)La12 cuboctahedra, edges with six equivalent La(2)La10Mg2 cuboctahedra, edges with eight equivalent La(1)La9Mg3 cuboctahedra, faces with four equivalent Mg(1)La12 cuboctahedra, faces with eight equivalent La(2)La10Mg2 cuboctahedra, and faces with eight equivalent La(1)La9Mg3 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_La5Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.431
_cell_length_b   6.431
_cell_length_c   5.826
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   208.658
_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
  La  La0  1  0.333  0.667  0.500  1.0
  La  La1  1  0.000  0.688  0.000  1.0
  La  La2  1  0.688  0.000  0.000  1.0
  La  La3  1  0.312  0.312  0.000  1.0
  La  La4  1  0.667  0.333  0.500  1.0
  Mg  Mg5  1  0.000  0.000  0.500  1.0
[/CIF]
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