The compound described by MgLa2Al3 crystallizes in the trigonal R-3m space group. Mg(1) is bonded to six equivalent La(1) and six equivalent Al(1) atoms to form distorted MgLa6Al6 cuboctahedra that share corners with six equivalent Mg(1)La6Al6 cuboctahedra, corners with twelve equivalent Al(1)La6Mg2Al4 cuboctahedra, edges with six equivalent Mg(1)La6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)La6Mg2Al4 cuboctahedra. La(1) is bonded in a 16-coordinate geometry to three equivalent Mg(1), four equivalent La(1), and nine equivalent Al(1) atoms. Al(1) is bonded to two equivalent Mg(1), six equivalent La(1), and four equivalent Al(1) atoms to form AlLa6Mg2Al4 cuboctahedra that share corners with four equivalent Mg(1)La6Al6 cuboctahedra, corners with fourteen equivalent Al(1)La6Mg2Al4 cuboctahedra, edges with six equivalent Al(1)La6Mg2Al4 cuboctahedra, faces with six equivalent Mg(1)La6Al6 cuboctahedra, and faces with twelve equivalent Al(1)La6Mg2Al4 cuboctahedra. is represented by the CIF card [CIF]
data_La2MgAl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.796
_cell_length_b   5.796
_cell_length_c   5.796
_cell_angle_alpha   60.961
_cell_angle_beta   60.961
_cell_angle_gamma   60.961
_symmetry_Int_Tables_number   1
_cell_volume   140.678
_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  0.619  0.619  0.619  1.0
  La  La1  1  0.381  0.381  0.381  1.0
  Mg  Mg2  1  0.000  0.000  0.000  1.0
  Al  Al3  1  0.000  0.500  0.000  1.0
  Al  Al4  1  0.500  0.000  0.000  1.0
  Al  Al5  1  0.000  0.000  0.500  1.0
[/CIF]
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The compound described by MgLa2Al3 crystallizes in the trigonal R-3m space group. Mg(1) is bonded to six equivalent La(1) and six equivalent Al(1) atoms to form distorted MgLa6Al6 cuboctahedra that share corners with six equivalent Mg(1)La6Al6 cuboctahedra, corners with twelve equivalent Al(1)La6Mg2Al4 cuboctahedra, edges with six equivalent Mg(1)La6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)La6Mg2Al4 cuboctahedra. La(1) is bonded in a 16-coordinate geometry to three equivalent Mg(1), four equivalent La(1), and nine equivalent Al(1) atoms. Al(1) is bonded to two equivalent Mg(1), six equivalent La(1), and four equivalent Al(1) atoms to form AlLa6Mg2Al4 cuboctahedra that share corners with four equivalent Mg(1)La6Al6 cuboctahedra, corners with fourteen equivalent Al(1)La6Mg2Al4 cuboctahedra, edges with six equivalent Al(1)La6Mg2Al4 cuboctahedra, faces with six equivalent Mg(1)La6Al6 cuboctahedra, and faces with twelve equivalent Al(1)La6Mg2Al4 cuboctahedra. is represented by the CIF card [CIF]
data_La2MgAl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.796
_cell_length_b   5.796
_cell_length_c   5.796
_cell_angle_alpha   60.961
_cell_angle_beta   60.961
_cell_angle_gamma   60.961
_symmetry_Int_Tables_number   1
_cell_volume   140.678
_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  0.619  0.619  0.619  1.0
  La  La1  1  0.381  0.381  0.381  1.0
  Mg  Mg2  1  0.000  0.000  0.000  1.0
  Al  Al3  1  0.000  0.500  0.000  1.0
  Al  Al4  1  0.500  0.000  0.000  1.0
  Al  Al5  1  0.000  0.000  0.500  1.0
[/CIF]
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