The compound described by MgCe2 crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to six equivalent Mg(1) and six equivalent Ce(1) atoms to form MgCe6Mg6 cuboctahedra that share corners with six equivalent Mg(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, edges with six equivalent Mg(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, faces with six equivalent Mg(1)Ce6Mg6 cuboctahedra, and faces with fourteen equivalent Ce(1)Ce9Mg3 cuboctahedra. Ce(1) is bonded to three equivalent Mg(1) and nine equivalent Ce(1) atoms to form CeCe9Mg3 cuboctahedra that share corners with six equivalent Mg(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, edges with six equivalent Mg(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, faces with seven equivalent Mg(1)Ce6Mg6 cuboctahedra, and faces with thirteen equivalent Ce(1)Ce9Mg3 cuboctahedra. is represented by the CIF card [CIF]
data_Ce2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.123
_cell_length_b   3.123
_cell_length_c   18.240
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   154.034
_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
  Ce  Ce0  1  0.333  0.667  0.914  1.0
  Ce  Ce1  1  0.333  0.667  0.586  1.0
  Ce  Ce2  1  0.667  0.333  0.414  1.0
  Ce  Ce3  1  0.667  0.333  0.086  1.0
  Mg  Mg4  1  0.667  0.333  0.750  1.0
  Mg  Mg5  1  0.333  0.667  0.250  1.0
[/CIF]
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The compound described by MgCe2 crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to six equivalent Mg(1) and six equivalent Ce(1) atoms to form MgCe6Mg6 cuboctahedra that share corners with six equivalent Mg(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, edges with six equivalent Mg(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, faces with six equivalent Mg(1)Ce6Mg6 cuboctahedra, and faces with fourteen equivalent Ce(1)Ce9Mg3 cuboctahedra. Ce(1) is bonded to three equivalent Mg(1) and nine equivalent Ce(1) atoms to form CeCe9Mg3 cuboctahedra that share corners with six equivalent Mg(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, edges with six equivalent Mg(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Ce(1)Ce9Mg3 cuboctahedra, faces with seven equivalent Mg(1)Ce6Mg6 cuboctahedra, and faces with thirteen equivalent Ce(1)Ce9Mg3 cuboctahedra. is represented by the CIF card [CIF]
data_Ce2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.123
_cell_length_b   3.123
_cell_length_c   18.240
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   154.034
_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
  Ce  Ce0  1  0.333  0.667  0.914  1.0
  Ce  Ce1  1  0.333  0.667  0.586  1.0
  Ce  Ce2  1  0.667  0.333  0.414  1.0
  Ce  Ce3  1  0.667  0.333  0.086  1.0
  Mg  Mg4  1  0.667  0.333  0.750  1.0
  Mg  Mg5  1  0.333  0.667  0.250  1.0
[/CIF]
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