The material described by Mg2La crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), and six equivalent La(1) atoms to form distorted MgLa6Mg6 cuboctahedra that share corners with six equivalent Mg(2)La4Mg8 cuboctahedra, corners with six equivalent Mg(1)La6Mg6 cuboctahedra, corners with six equivalent La(1)La2Mg10 cuboctahedra, edges with seven equivalent La(1)La2Mg10 cuboctahedra, edges with eleven equivalent Mg(2)La4Mg8 cuboctahedra, faces with four equivalent Mg(2)La4Mg8 cuboctahedra, faces with six equivalent La(1)La2Mg10 cuboctahedra, and faces with ten equivalent Mg(1)La6Mg6 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), six equivalent Mg(2), and four equivalent La(1) atoms to form distorted MgLa4Mg8 cuboctahedra that share corners with six equivalent Mg(2)La4Mg8 cuboctahedra, corners with six equivalent Mg(1)La6Mg6 cuboctahedra, corners with six equivalent La(1)La2Mg10 cuboctahedra, edges with three equivalent La(1)La2Mg10 cuboctahedra, edges with four equivalent Mg(2)La4Mg8 cuboctahedra, edges with eleven equivalent Mg(1)La6Mg6 cuboctahedra, faces with four equivalent Mg(1)La6Mg6 cuboctahedra, faces with eight equivalent Mg(2)La4Mg8 cuboctahedra, and faces with eight equivalent La(1)La2Mg10 cuboctahedra. La(1) is bonded to four equivalent Mg(2), six equivalent Mg(1), and two equivalent La(1) atoms to form LaLa2Mg10 cuboctahedra that share corners with six equivalent Mg(2)La4Mg8 cuboctahedra, corners with six equivalent Mg(1)La6Mg6 cuboctahedra, corners with six equivalent La(1)La2Mg10 cuboctahedra, edges with three equivalent Mg(2)La4Mg8 cuboctahedra, edges with seven equivalent Mg(1)La6Mg6 cuboctahedra, edges with eight equivalent La(1)La2Mg10 cuboctahedra, faces with six equivalent Mg(1)La6Mg6 cuboctahedra, faces with six equivalent La(1)La2Mg10 cuboctahedra, and faces with eight equivalent Mg(2)La4Mg8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.120
_cell_length_b   9.120
_cell_length_c   5.660
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   158.558
_symmetry_Int_Tables_number   1
_cell_volume   172.106
_cell_formula_units_Z   2
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  0.890  0.110  0.250  1.0
  La  La1  1  0.110  0.890  0.750  1.0
  Mg  Mg2  1  0.557  0.443  0.250  1.0
  Mg  Mg3  1  0.220  0.780  0.250  1.0
  Mg  Mg4  1  0.780  0.220  0.750  1.0
  Mg  Mg5  1  0.443  0.557  0.750  1.0
[/CIF]
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The material described by Mg2La crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), and six equivalent La(1) atoms to form distorted MgLa6Mg6 cuboctahedra that share corners with six equivalent Mg(2)La4Mg8 cuboctahedra, corners with six equivalent Mg(1)La6Mg6 cuboctahedra, corners with six equivalent La(1)La2Mg10 cuboctahedra, edges with seven equivalent La(1)La2Mg10 cuboctahedra, edges with eleven equivalent Mg(2)La4Mg8 cuboctahedra, faces with four equivalent Mg(2)La4Mg8 cuboctahedra, faces with six equivalent La(1)La2Mg10 cuboctahedra, and faces with ten equivalent Mg(1)La6Mg6 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1), six equivalent Mg(2), and four equivalent La(1) atoms to form distorted MgLa4Mg8 cuboctahedra that share corners with six equivalent Mg(2)La4Mg8 cuboctahedra, corners with six equivalent Mg(1)La6Mg6 cuboctahedra, corners with six equivalent La(1)La2Mg10 cuboctahedra, edges with three equivalent La(1)La2Mg10 cuboctahedra, edges with four equivalent Mg(2)La4Mg8 cuboctahedra, edges with eleven equivalent Mg(1)La6Mg6 cuboctahedra, faces with four equivalent Mg(1)La6Mg6 cuboctahedra, faces with eight equivalent Mg(2)La4Mg8 cuboctahedra, and faces with eight equivalent La(1)La2Mg10 cuboctahedra. La(1) is bonded to four equivalent Mg(2), six equivalent Mg(1), and two equivalent La(1) atoms to form LaLa2Mg10 cuboctahedra that share corners with six equivalent Mg(2)La4Mg8 cuboctahedra, corners with six equivalent Mg(1)La6Mg6 cuboctahedra, corners with six equivalent La(1)La2Mg10 cuboctahedra, edges with three equivalent Mg(2)La4Mg8 cuboctahedra, edges with seven equivalent Mg(1)La6Mg6 cuboctahedra, edges with eight equivalent La(1)La2Mg10 cuboctahedra, faces with six equivalent Mg(1)La6Mg6 cuboctahedra, faces with six equivalent La(1)La2Mg10 cuboctahedra, and faces with eight equivalent Mg(2)La4Mg8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.120
_cell_length_b   9.120
_cell_length_c   5.660
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   158.558
_symmetry_Int_Tables_number   1
_cell_volume   172.106
_cell_formula_units_Z   2
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  0.890  0.110  0.250  1.0
  La  La1  1  0.110  0.890  0.750  1.0
  Mg  Mg2  1  0.557  0.443  0.250  1.0
  Mg  Mg3  1  0.220  0.780  0.250  1.0
  Mg  Mg4  1  0.780  0.220  0.750  1.0
  Mg  Mg5  1  0.443  0.557  0.750  1.0
[/CIF]
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