The material described by MgLa3 crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded in a 10-coordinate geometry to four equivalent La(1) and six equivalent La(2) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Mg(1), two equivalent La(1), and six equivalent La(2) atoms to form distorted LaLa8Mg4 cuboctahedra that share corners with fourteen equivalent La(1)La8Mg4 cuboctahedra, edges with two equivalent La(1)La8Mg4 cuboctahedra, edges with twelve equivalent La(2)La9Mg3 cuboctahedra, faces with two equivalent La(1)La8Mg4 cuboctahedra, and faces with twelve equivalent La(2)La9Mg3 cuboctahedra. In the second La site, La(2) is bonded to three equivalent Mg(1), three equivalent La(1), and six equivalent La(2) atoms to form distorted LaLa9Mg3 cuboctahedra that share corners with eighteen equivalent La(2)La9Mg3 cuboctahedra, edges with six equivalent La(1)La8Mg4 cuboctahedra, edges with six equivalent La(2)La9Mg3 cuboctahedra, faces with six equivalent La(1)La8Mg4 cuboctahedra, and faces with eight equivalent La(2)La9Mg3 cuboctahedra. is represented by the CIF file [CIF]
data_La3Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.871
_cell_length_b   6.871
_cell_length_c   6.871
_cell_angle_alpha   148.068
_cell_angle_beta   126.449
_cell_angle_gamma   63.719
_symmetry_Int_Tables_number   1
_cell_volume   136.575
_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  0.147  0.500  0.647  1.0
  La  La1  1  0.281  0.272  0.009  1.0
  La  La2  1  0.737  0.728  0.009  1.0
  Mg  Mg3  1  0.669  0.000  0.669  1.0
[/CIF]
.
The material described by MgLa3 crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded in a 10-coordinate geometry to four equivalent La(1) and six equivalent La(2) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Mg(1), two equivalent La(1), and six equivalent La(2) atoms to form distorted LaLa8Mg4 cuboctahedra that share corners with fourteen equivalent La(1)La8Mg4 cuboctahedra, edges with two equivalent La(1)La8Mg4 cuboctahedra, edges with twelve equivalent La(2)La9Mg3 cuboctahedra, faces with two equivalent La(1)La8Mg4 cuboctahedra, and faces with twelve equivalent La(2)La9Mg3 cuboctahedra. In the second La site, La(2) is bonded to three equivalent Mg(1), three equivalent La(1), and six equivalent La(2) atoms to form distorted LaLa9Mg3 cuboctahedra that share corners with eighteen equivalent La(2)La9Mg3 cuboctahedra, edges with six equivalent La(1)La8Mg4 cuboctahedra, edges with six equivalent La(2)La9Mg3 cuboctahedra, faces with six equivalent La(1)La8Mg4 cuboctahedra, and faces with eight equivalent La(2)La9Mg3 cuboctahedra. is represented by the CIF file [CIF]
data_La3Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.871
_cell_length_b   6.871
_cell_length_c   6.871
_cell_angle_alpha   148.068
_cell_angle_beta   126.449
_cell_angle_gamma   63.719
_symmetry_Int_Tables_number   1
_cell_volume   136.575
_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  0.147  0.500  0.647  1.0
  La  La1  1  0.281  0.272  0.009  1.0
  La  La2  1  0.737  0.728  0.009  1.0
  Mg  Mg3  1  0.669  0.000  0.669  1.0
[/CIF]
.