The material structure described by CeMg2 is alpha Samarium-derived structured and crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with six equivalent Mg(1)Mg12 cuboctahedra, edges with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra, faces with two equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with six equivalent Mg(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1), six equivalent Mg(2), and three equivalent Ce(1) atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent Mg(3)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(1)Mg12 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra,  a faceface with one Mg(3)Ce6Mg6 cuboctahedra, faces with six equivalent Mg(1)Mg12 cuboctahedra, faces with six equivalent Ce(1)Ce6Mg6 cuboctahedra, and faces with seven equivalent Mg(2)Ce3Mg9 cuboctahedra. In the third Mg site, Mg(3) is bonded to six equivalent Mg(3) and six equivalent Ce(1) atoms to form MgCe6Mg6 cuboctahedra that share corners with six equivalent Mg(3)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(3)Ce6Mg6 cuboctahedra, edges with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with two equivalent Mg(2)Ce3Mg9 cuboctahedra, faces with six equivalent Mg(3)Ce6Mg6 cuboctahedra, and faces with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra. Ce(1) is bonded to three equivalent Mg(2), three equivalent Mg(3), and six equivalent Ce(1) atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with six equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(3)Ce6Mg6 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with six equivalent Mg(2)Ce3Mg9 cuboctahedra, faces with six equivalent Mg(3)Ce6Mg6 cuboctahedra, and faces with seven equivalent Ce(1)Ce6Mg6 cuboctahedra. is represented by the CIF file [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.102
_cell_length_b   3.102
_cell_length_c   17.116
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   142.614
_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  0.000  0.000  0.175  1.0
  Ce  Ce1  1  0.000  0.000  0.825  1.0
  Mg  Mg2  1  0.000  0.000  0.500  1.0
  Mg  Mg3  1  0.667  0.333  0.347  1.0
  Mg  Mg4  1  0.667  0.333  0.000  1.0
  Mg  Mg5  1  0.667  0.333  0.653  1.0
[/CIF]
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The material structure described by CeMg2 is alpha Samarium-derived structured and crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to six equivalent Mg(1) and six equivalent Mg(2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with six equivalent Mg(1)Mg12 cuboctahedra, edges with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra, faces with two equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with six equivalent Mg(1)Mg12 cuboctahedra, and faces with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1), six equivalent Mg(2), and three equivalent Ce(1) atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent Mg(3)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(1)Mg12 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra,  a faceface with one Mg(3)Ce6Mg6 cuboctahedra, faces with six equivalent Mg(1)Mg12 cuboctahedra, faces with six equivalent Ce(1)Ce6Mg6 cuboctahedra, and faces with seven equivalent Mg(2)Ce3Mg9 cuboctahedra. In the third Mg site, Mg(3) is bonded to six equivalent Mg(3) and six equivalent Ce(1) atoms to form MgCe6Mg6 cuboctahedra that share corners with six equivalent Mg(3)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(3)Ce6Mg6 cuboctahedra, edges with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with two equivalent Mg(2)Ce3Mg9 cuboctahedra, faces with six equivalent Mg(3)Ce6Mg6 cuboctahedra, and faces with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra. Ce(1) is bonded to three equivalent Mg(2), three equivalent Mg(3), and six equivalent Ce(1) atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with twelve equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with six equivalent Mg(2)Ce3Mg9 cuboctahedra, edges with six equivalent Mg(3)Ce6Mg6 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with six equivalent Mg(2)Ce3Mg9 cuboctahedra, faces with six equivalent Mg(3)Ce6Mg6 cuboctahedra, and faces with seven equivalent Ce(1)Ce6Mg6 cuboctahedra. is represented by the CIF file [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.102
_cell_length_b   3.102
_cell_length_c   17.116
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   142.614
_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  0.000  0.000  0.175  1.0
  Ce  Ce1  1  0.000  0.000  0.825  1.0
  Mg  Mg2  1  0.000  0.000  0.500  1.0
  Mg  Mg3  1  0.667  0.333  0.347  1.0
  Mg  Mg4  1  0.667  0.333  0.000  1.0
  Mg  Mg5  1  0.667  0.333  0.653  1.0
[/CIF]
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