The compound described by Mg2La crystallizes in the hexagonal P-62m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), and four equivalent La(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and six equivalent La(1) atoms to form MgLa6Mg6 cuboctahedra that share corners with eighteen equivalent La(1)La3Mg9 cuboctahedra, edges with six equivalent Mg(2)La6Mg6 cuboctahedra, faces with two equivalent Mg(2)La6Mg6 cuboctahedra, and faces with six equivalent La(1)La3Mg9 cuboctahedra. La(1) is bonded to three equivalent Mg(2), six equivalent Mg(1), and three equivalent La(1) atoms to form LaLa3Mg9 cuboctahedra that share corners with nine equivalent Mg(2)La6Mg6 cuboctahedra, corners with nine equivalent La(1)La3Mg9 cuboctahedra, edges with six equivalent La(1)La3Mg9 cuboctahedra, faces with three equivalent Mg(2)La6Mg6 cuboctahedra, and faces with five equivalent La(1)La3Mg9 cuboctahedra. is represented by the CIF card [CIF]
data_LaMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.084
_cell_length_b   6.084
_cell_length_c   5.354
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   171.613
_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  0.667  0.333  0.500  1.0
  La  La1  1  0.333  0.667  0.500  1.0
  Mg  Mg2  1  0.000  0.700  0.000  1.0
  Mg  Mg3  1  0.700  0.000  0.000  1.0
  Mg  Mg4  1  0.300  0.300  0.000  1.0
  Mg  Mg5  1  0.000  0.000  0.500  1.0
[/CIF]
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The compound described by Mg2La crystallizes in the hexagonal P-62m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), and four equivalent La(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and six equivalent La(1) atoms to form MgLa6Mg6 cuboctahedra that share corners with eighteen equivalent La(1)La3Mg9 cuboctahedra, edges with six equivalent Mg(2)La6Mg6 cuboctahedra, faces with two equivalent Mg(2)La6Mg6 cuboctahedra, and faces with six equivalent La(1)La3Mg9 cuboctahedra. La(1) is bonded to three equivalent Mg(2), six equivalent Mg(1), and three equivalent La(1) atoms to form LaLa3Mg9 cuboctahedra that share corners with nine equivalent Mg(2)La6Mg6 cuboctahedra, corners with nine equivalent La(1)La3Mg9 cuboctahedra, edges with six equivalent La(1)La3Mg9 cuboctahedra, faces with three equivalent Mg(2)La6Mg6 cuboctahedra, and faces with five equivalent La(1)La3Mg9 cuboctahedra. is represented by the CIF card [CIF]
data_LaMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.084
_cell_length_b   6.084
_cell_length_c   5.354
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   171.613
_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  0.667  0.333  0.500  1.0
  La  La1  1  0.333  0.667  0.500  1.0
  Mg  Mg2  1  0.000  0.700  0.000  1.0
  Mg  Mg3  1  0.700  0.000  0.000  1.0
  Mg  Mg4  1  0.300  0.300  0.000  1.0
  Mg  Mg5  1  0.000  0.000  0.500  1.0
[/CIF]
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